/* ============================================================
   Google I/O 2025 Keynote — True Full-Page Slide Deck
   Dark canvas, vibrant Google palette, full-page transitions
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    /* Google brand palette */
    --blue:    #4285F4;
    --green:   #34A853;
    --yellow:  #FBBC04;
    --red:     #EA4335;
    /* Extended I/O accents */
    --blue-l:  #8AB4F8;
    --green-l: #81C995;
    --yellow-l:#FDE293;
    --red-l:   #F28B82;
    --cyan:    #4DD0E1;
    --purple:  #A142F4;
    --purple-l:#D7AEFB;

    /* Surfaces — deep I/O dark */
    --bg:       #1A1A2E;
    --bg-2:     #16213E;
    --surface:  rgba(255,255,255,0.04);
    --surface2: rgba(255,255,255,0.07);
    --glass:    rgba(255,255,255,0.06);

    /* Text */
    --text:   #E8EAED;
    --text2:  #BDC1C6;
    --text3:  #9AA0A6;
    --text4:  #5F6368;

    /* Borders */
    --border:   rgba(255,255,255,0.08);
    --border-h: rgba(255,255,255,0.18);

    /* Gradients */
    --g-google: linear-gradient(135deg, #4285F4, #34A853, #FBBC04, #EA4335);
    --g-text:   linear-gradient(90deg, #8AB4F8, #81C995, #FDE293, #F28B82, #D7AEFB, #8AB4F8);
    --g-hero:   linear-gradient(135deg, #4285F4 0%, #34A853 40%, #FBBC04 70%, #EA4335 100%);

    /* Shape */
    --r:    16px;
    --r-l:  24px;

    /* Font */
    --font: 'Google Sans', 'Product Sans', 'Inter', system-ui, -apple-system, sans-serif;
    --mono: 'JetBrains Mono', monospace;

    /* Easing */
    --ease: cubic-bezier(0.0, 0.0, 0.2, 1);
}

/* ==================== BASE ==================== */
html {
    font-size: 16px;
    overflow: hidden;
    height: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

::selection {
    background: rgba(66,133,244,0.3);
    color: #fff;
}

/* ==================== PROGRESS BAR ==================== */
.progress-bar {
    position: fixed; top: 0; left: 0;
    width: 100%; height: 4px;
    background: rgba(255,255,255,0.06);
    z-index: 1000;
}
.progress-fill {
    height: 100%; width: 0%;
    background: var(--g-hero);
    transition: width 0.6s var(--ease);
}

/* ==================== SLIDE COUNTER ==================== */
.slide-counter {
    position: fixed; bottom: 28px; right: 36px;
    font-size: 14px; color: var(--text4);
    font-weight: 500; letter-spacing: 0.04em;
    z-index: 100; font-variant-numeric: tabular-nums;
}
.slide-counter .current {
    color: var(--text); font-weight: 700; font-size: 16px;
}

/* ==================== DOT NAVIGATION ==================== */
.dot-nav {
    position: fixed; right: 20px; top: 50%;
    transform: translateY(-50%);
    display: flex; flex-direction: column; gap: 8px;
    z-index: 100;
}
.dot-nav .dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: rgba(255,255,255,0.15);
    border: none; cursor: pointer;
    transition: all 0.4s var(--ease); padding: 0;
}
.dot-nav .dot:hover {
    background: rgba(255,255,255,0.4);
    transform: scale(1.5);
}
.dot-nav .dot.active {
    background: var(--blue);
    box-shadow: 0 0 12px rgba(66,133,244,0.6);
    transform: scale(1.4);
    width: 8px; height: 24px; border-radius: 4px;
}

/* ==================== KEYBOARD HINT ==================== */
.keyboard-hint {
    position: fixed; bottom: 28px; left: 50%;
    transform: translateX(-50%);
    font-size: 13px; color: var(--text4);
    display: flex; align-items: center; gap: 8px;
    z-index: 100; opacity: 1;
    transition: opacity 0.8s ease;
}
.keyboard-hint.hidden { opacity: 0; pointer-events: none; }
.keyboard-hint .material-symbols-outlined { font-size: 18px; color: var(--text3); }
.keyboard-hint kbd {
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 4px; padding: 2px 8px;
    font-family: var(--font); font-size: 12px; color: var(--text3);
}

/* ==================== BRAND BADGE ==================== */
.brand-badge {
    position: fixed; top: 20px; left: 28px;
    display: flex; align-items: center; gap: 10px;
    font-size: 14px; font-weight: 500; color: var(--text3);
    z-index: 100; letter-spacing: 0.02em;
}

/* ==================== GRADIENT TEXT ==================== */
.gradient-text {
    background: var(--g-text);
    background-size: 400% 100%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 8s ease infinite;
}
@keyframes gradientShift {
    0%   { background-position: 0% 50%; }
    50%  { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* ============================================================
   SLIDES — FULL PAGE, ABSOLUTE POSITIONED, JS CONTROLLED
   ============================================================ */
.presentation {
    width: 100%;
    height: 100vh;
    position: relative;
    overflow: hidden;
}

.slide {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px 100px;
    overflow-y: auto;
    overflow-x: hidden;
    opacity: 0;
    transform: translateY(60px);
    transition: opacity 0.65s var(--ease),
                transform 0.65s var(--ease);
    pointer-events: none;
    will-change: transform, opacity;
    background: var(--bg);
}

.slide.active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    z-index: 2;
}

.slide.prev {
    opacity: 0;
    transform: translateY(-50px);
    pointer-events: none;
    z-index: 1;
}

.slide:nth-child(even) {
    background: linear-gradient(180deg, var(--bg-2) 0%, var(--bg) 100%);
}
.slide-title, .slide-dark-accent, .slide-cta {
    background: var(--bg) !important;
}

.slide-content {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.slide-content.centered {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* ==================== ANIMATIONS ==================== */
.animate-in {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s var(--ease),
                transform 0.7s var(--ease);
}
.slide.active .animate-in.visible {
    opacity: 1;
    transform: translateY(0);
}
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.4s; }
.delay-4 { transition-delay: 0.6s; }

/* ==================== BACKGROUND ORBS ==================== */
.slide-bg-orbs {
    position: absolute; inset: 0;
    overflow: hidden; z-index: 0; pointer-events: none;
}
.orb {
    position: absolute; border-radius: 50%;
    filter: blur(100px); opacity: 0.15;
    animation: orbFloat 15s ease-in-out infinite;
    will-change: transform;
}
.orb-blue   { background: var(--blue);   width: 400px; height: 400px; left: 5%;  top: 15%; }
.orb-green  { background: var(--green);  width: 350px; height: 350px; right: 10%; top: 55%; animation-delay: -4s; }
.orb-yellow { background: var(--yellow); width: 280px; height: 280px; left: 45%; top: 5%;  animation-delay: -8s; }
.orb-red    { background: var(--red);    width: 300px; height: 300px; right: 25%; bottom: 15%; animation-delay: -12s; }
.orb-purple { background: var(--purple); width: 350px; height: 350px; }

@keyframes orbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25%      { transform: translate(20px, -15px) scale(1.05); }
    50%      { transform: translate(-15px, 25px) scale(0.95); }
    75%      { transform: translate(10px, 10px) scale(1.02); }
}

/* ==================== TITLE SLIDE ==================== */
.slide-title {
    background: radial-gradient(ellipse 80% 70% at 50% 40%, rgba(66,133,244,0.12) 0%, transparent 70%),
                radial-gradient(ellipse 50% 40% at 70% 65%, rgba(52,168,83,0.06) 0%, transparent 60%),
                var(--bg) !important;
}

.title-badge {
    display: inline-flex; align-items: center; gap: 10px;
    background: rgba(66,133,244,0.1);
    border: 1px solid rgba(66,133,244,0.2);
    border-radius: 100px; padding: 10px 24px;
    font-size: 13px; font-weight: 500;
    color: var(--blue-l);
    letter-spacing: 0.08em; text-transform: uppercase;
}

.pulse-dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 12px rgba(52,168,83,0.6);
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50%      { opacity: 0.4; transform: scale(0.6); }
}

.title-main {
    font-size: clamp(52px, 7.5vw, 96px);
    font-weight: 700; line-height: 1.05;
    margin-top: 40px; letter-spacing: -0.03em;
    color: #fff;
}

.title-sub {
    font-size: clamp(18px, 2.2vw, 24px);
    color: var(--text2); margin-top: 28px;
    font-weight: 400; max-width: 620px; line-height: 1.6;
}
.title-sub strong { color: #fff; font-weight: 600; }

.title-meta {
    display: flex; align-items: center; gap: 16px;
    margin-top: 40px; font-size: 14px;
    color: var(--text4); font-weight: 500;
}
.meta-dot { color: var(--text4); }

.scroll-indicator { margin-top: 60px; }
.scroll-arrow {
    width: 24px; height: 24px;
    border-right: 2px solid var(--text4);
    border-bottom: 2px solid var(--text4);
    transform: rotate(45deg);
    animation: scrollBounce 2s ease-in-out infinite;
}
@keyframes scrollBounce {
    0%, 100% { transform: rotate(45deg) translate(0, 0); opacity: 0.3; }
    50%      { transform: rotate(45deg) translate(6px, 6px); opacity: 0.8; }
}

/* ==================== SECTION LABELS ==================== */
.section-label {
    font-size: 14px; font-weight: 500;
    text-transform: uppercase; letter-spacing: 0.12em;
    color: var(--blue-l); margin-bottom: 20px;
}

.slide-heading {
    font-size: clamp(32px, 4.5vw, 56px);
    font-weight: 700; line-height: 1.1;
    letter-spacing: -0.02em; margin-bottom: 20px;
    color: #fff;
}

.slide-desc {
    font-size: clamp(16px, 1.6vw, 19px);
    color: var(--text2); max-width: 800px;
    line-height: 1.7; margin-bottom: 40px;
}
.slide-desc strong { color: #fff; font-weight: 600; }
.slide-desc em { color: var(--blue-l); font-style: italic; }

/* ==================== STAT CARDS ==================== */
.stats-grid {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 20px; margin: 36px 0;
}
.stat-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--r); padding: 28px 20px;
    text-align: center; transition: all 0.3s var(--ease);
}
.stat-card:hover {
    background: var(--surface2); border-color: var(--border-h);
    transform: translateY(-4px);
}
.stat-icon {
    width: 48px; height: 48px; border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 14px;
}
.stat-icon.blue   { background: rgba(66,133,244,0.15);  color: var(--blue); }
.stat-icon.green  { background: rgba(52,168,83,0.15);   color: var(--green); }
.stat-icon.yellow { background: rgba(251,188,4,0.15);   color: var(--yellow); }
.stat-icon.red    { background: rgba(234,67,53,0.15);   color: var(--red); }

.stat-number {
    font-size: 36px; font-weight: 700; color: #fff;
    letter-spacing: -0.02em; font-variant-numeric: tabular-nums;
}
.stat-label {
    font-size: 13px; color: var(--text3);
    margin-top: 8px; line-height: 1.4;
}

/* ==================== CALLOUT BOX ==================== */
.callout-box {
    display: flex; align-items: flex-start; gap: 16px;
    background: rgba(66,133,244,0.06);
    border: 1px solid rgba(66,133,244,0.15);
    border-radius: var(--r); padding: 24px 28px;
    font-size: 17px; line-height: 1.7; color: var(--text);
    font-weight: 500;
}
.callout-box .material-symbols-outlined { color: var(--blue); font-size: 28px; flex-shrink: 0; margin-top: 2px; }
.callout-box strong { color: #fff; font-weight: 700; }
.highlight-text { color: var(--yellow); font-weight: 600; }
.highlight-red  { color: var(--red-l); }

/* ==================== TWO COLUMN GRID ==================== */
.two-col-grid {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 24px; margin: 36px 0;
}

/* ==================== FORCE CARDS ==================== */
.force-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--r-l); padding: 36px 32px;
    position: relative; overflow: hidden;
    transition: all 0.3s var(--ease);
}
.force-card:hover {
    background: var(--surface2); border-color: var(--border-h);
    transform: translateY(-3px);
}
.force-card::before {
    content: ''; position: absolute;
    top: 0; left: 0; right: 0; height: 3px;
}
.force-blue::before { background: var(--g-google); }
.force-green::before { background: linear-gradient(90deg, var(--green), var(--cyan)); }

.force-number {
    font-size: 64px; font-weight: 700;
    color: rgba(255,255,255,0.04);
    position: absolute; top: 20px; right: 28px;
    line-height: 1; user-select: none;
}
.force-card h3 {
    font-size: 20px; font-weight: 600;
    margin-bottom: 24px; line-height: 1.3; color: #fff;
}
.force-list {
    list-style: none; display: flex;
    flex-direction: column; gap: 16px;
}
.force-list li {
    font-size: 15px; color: var(--text2);
    line-height: 1.5; padding-left: 24px; position: relative;
}
.force-list li::before {
    content: '→'; position: absolute; left: 0; color: var(--text4);
}
.force-stat {
    font-weight: 600; color: #fff; font-variant-numeric: tabular-nums;
}
.slide-footnote {
    text-align: center; font-size: 19px;
    color: var(--text); font-style: italic; margin-top: 12px;
    font-weight: 500;
}

/* ==================== PAIN GRID ==================== */
.pain-grid {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 20px; margin: 36px 0;
}
.pain-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--r); padding: 28px 20px;
    text-align: center; transition: all 0.3s var(--ease);
}
.pain-card:hover {
    border-color: rgba(234,67,53,0.3);
    background: rgba(234,67,53,0.05);
    transform: translateY(-3px);
}
.pain-number {
    font-size: 28px; font-weight: 700;
    color: var(--red-l); margin-bottom: 10px;
}
.pain-detail {
    font-size: 13px; color: var(--text3); line-height: 1.5;
}

.impact-statement {
    display: flex; align-items: flex-start; gap: 16px;
    background: rgba(234,67,53,0.06);
    border: 1px solid rgba(234,67,53,0.15);
    border-radius: var(--r); padding: 24px 28px;
    font-size: 17px; color: var(--text); line-height: 1.7;
    font-weight: 500;
}
.impact-arrow {
    font-size: 24px; color: var(--red);
    font-weight: 700; flex-shrink: 0;
}
.impact-statement strong { color: #fff; }

/* ==================== RESULTS GRID ==================== */
.results-grid {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 20px; margin: 36px 0;
}
.result-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--r); padding: 28px 20px;
    text-align: center; position: relative; overflow: hidden;
    transition: all 0.3s var(--ease);
}
.result-card:hover { transform: translateY(-4px); }
.result-card::before {
    content: ''; position: absolute;
    top: 0; left: 0; right: 0; height: 3px;
}
.glow-blue::before   { background: var(--blue); }
.glow-green::before  { background: var(--green); }
.glow-yellow::before { background: var(--yellow); }
.glow-red::before    { background: var(--red); }

.glow-blue:hover   { border-color: rgba(66,133,244,0.3);  box-shadow: 0 8px 40px rgba(66,133,244,0.12); }
.glow-green:hover  { border-color: rgba(52,168,83,0.3);   box-shadow: 0 8px 40px rgba(52,168,83,0.12); }
.glow-yellow:hover { border-color: rgba(251,188,4,0.3);   box-shadow: 0 8px 40px rgba(251,188,4,0.12); }
.glow-red:hover    { border-color: rgba(234,67,53,0.3);   box-shadow: 0 8px 40px rgba(234,67,53,0.12); }

.result-number {
    font-size: 42px; font-weight: 700;
    background: var(--g-text); background-size: 300% 100%;
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 8s ease infinite;
}
.result-label {
    font-size: 16px; font-weight: 600; color: #fff; margin-top: 10px;
}
.result-detail {
    font-size: 13px; color: var(--text3); margin-top: 6px; line-height: 1.4;
}

.proof-banner {
    display: flex; align-items: flex-start; gap: 16px;
    background: linear-gradient(135deg, rgba(66,133,244,0.06), rgba(52,168,83,0.06));
    border: 1px solid var(--border);
    border-radius: var(--r); padding: 24px 28px;
    font-size: 17px; color: var(--text); line-height: 1.7;
    font-weight: 500;
}
.proof-icon { font-size: 28px; flex-shrink: 0; color: var(--yellow); }
.proof-banner strong { color: #fff; font-weight: 700; }

/* ==================== STACK GRID ==================== */
.stack-grid {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 24px; margin: 36px 0;
}
.stack-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--r-l); padding: 32px 28px;
    position: relative; overflow: hidden;
    transition: all 0.3s var(--ease);
}
.stack-card:hover {
    transform: translateY(-4px); border-color: var(--border-h);
    background: var(--surface2);
}
.stack-card::before {
    content: ''; position: absolute;
    top: 0; left: 0; right: 0; height: 3px;
}
.stack-blue::before   { background: var(--blue); }
.stack-green::before  { background: var(--green); }
.stack-yellow::before { background: var(--yellow); }

.stack-layer {
    font-size: 11px; font-weight: 600;
    text-transform: uppercase; letter-spacing: 0.1em;
    color: var(--text4); margin-bottom: 14px;
}
.stack-product {
    font-size: 22px; font-weight: 600; margin-bottom: 20px;
    display: flex; align-items: center; gap: 10px; color: #fff;
}
.product-icon { font-size: 28px; }

.stack-features {
    list-style: none; display: flex;
    flex-direction: column; gap: 10px; margin-bottom: 20px;
}
.stack-features li {
    font-size: 14px; color: var(--text2);
    padding-left: 20px; position: relative; line-height: 1.5;
}
.stack-features li::before {
    content: '✓'; position: absolute; left: 0;
    color: var(--green); font-weight: 700;
}
.stack-tag {
    display: inline-block;
    background: rgba(255,255,255,0.06);
    border-radius: 100px; padding: 5px 16px;
    font-size: 12px; color: var(--text3); font-weight: 500;
}

/* ==================== COMPARISON TABLE ==================== */
.comparison-table {
    margin: 36px 0 24px; overflow-x: auto;
    border-radius: var(--r); border: 1px solid var(--border);
}
.comparison-table table {
    width: 100%; border-collapse: collapse; font-size: 14px;
}
.comparison-table thead { background: var(--surface); }
.comparison-table th {
    padding: 14px 20px; text-align: left;
    font-weight: 600; color: var(--text3);
    border-bottom: 1px solid var(--border);
    font-size: 13px; text-transform: uppercase; letter-spacing: 0.05em;
}
.comparison-table th.col-google { color: var(--blue-l); }
.comparison-table td {
    padding: 13px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    color: var(--text2);
}
.comparison-table td:first-child { font-weight: 600; color: #fff; }
.comparison-table td.col-google { background: rgba(66,133,244,0.04); }
.comparison-table tr:last-child td { border-bottom: none; }
.comparison-table tr:hover td { background: rgba(255,255,255,0.02); }
.comparison-table tr:hover td.col-google { background: rgba(66,133,244,0.07); }

.check-google { color: var(--green); font-weight: 600; }
.check-mid    { color: var(--yellow); }
.check-weak   { color: var(--text4); }
.check-no     { color: var(--red); opacity: 0.7; }

.comparison-callout {
    font-size: 17px; color: var(--text);
    line-height: 1.7; padding: 20px 0 0;
    font-weight: 500;
}
.comparison-callout strong { color: #fff; font-weight: 700; }

/* ==================== AGENT IMPACT GRID ==================== */
.agent-impact-grid {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 20px; margin: 36px 0;
}
.agent-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--r); padding: 28px 22px;
    text-align: center; transition: all 0.3s var(--ease);
}
.agent-card:hover {
    border-color: var(--border-h);
    transform: translateY(-4px);
    background: var(--surface2);
}
.agent-card .material-symbols-outlined {
    font-size: 36px; color: var(--green); margin-bottom: 16px;
}
.agent-card h4 {
    font-size: 16px; font-weight: 600; margin-bottom: 8px; color: #fff;
}
.agent-card p {
    font-size: 13px; color: var(--text3); line-height: 1.5;
}

.big-stat { text-align: center; margin-top: 12px; }
.big-number {
    font-size: 60px; font-weight: 700;
    background: var(--g-text); background-size: 300% 100%;
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 8s ease infinite;
}
.big-label {
    display: block; font-size: 20px;
    color: var(--text); margin-top: 10px;
    font-weight: 500;
}

/* ==================== DILEMMA CARDS ==================== */
.dilemma-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--r-l); padding: 36px 32px;
    transition: all 0.3s var(--ease);
}
.dilemma-card:hover {
    background: var(--surface2); border-color: var(--border-h);
}
.dilemma-card h3 {
    font-size: 20px; font-weight: 600; margin-bottom: 24px;
}
.dilemma-pro h3 { color: var(--green); }
.dilemma-con h3 { color: var(--red-l); }

.dilemma-card ul {
    list-style: none; display: flex;
    flex-direction: column; gap: 14px;
}
.dilemma-card ul li {
    font-size: 14px; color: var(--text2);
    padding-left: 24px; position: relative; line-height: 1.5;
}
.dilemma-pro ul li::before {
    content: '✓'; position: absolute; left: 0;
    color: var(--green); font-weight: 700;
}
.dilemma-con ul li::before {
    content: '✗'; position: absolute; left: 0;
    color: var(--red); font-weight: 700;
}
.dilemma-card ul li strong { color: #fff; }

.gap-statement {
    display: flex; align-items: flex-start; gap: 14px;
    background: rgba(251,188,4,0.06);
    border: 1px solid rgba(251,188,4,0.15);
    border-radius: var(--r); padding: 24px 28px;
    font-size: 17px; color: var(--text); line-height: 1.7;
    font-weight: 500;
}
.gap-statement .material-symbols-outlined { color: var(--yellow); font-size: 28px; flex-shrink: 0; }
.gap-statement strong { color: #fff; font-weight: 700; }

/* ==================== PLATFORM GRID ==================== */
.platform-grid {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 20px; margin: 36px 0;
}
.platform-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--r); padding: 28px 24px;
    transition: all 0.3s var(--ease);
}
.platform-card:hover {
    border-color: var(--border-h);
    transform: translateY(-4px);
    background: var(--surface2);
}
.platform-icon {
    width: 48px; height: 48px; border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 16px;
}
.platform-icon .material-symbols-outlined { font-size: 24px; }
.blue-bg   { background: rgba(66,133,244,0.15);  color: var(--blue); }
.green-bg  { background: rgba(52,168,83,0.15);   color: var(--green); }
.yellow-bg { background: rgba(251,188,4,0.15);   color: var(--yellow); }
.red-bg    { background: rgba(234,67,53,0.15);   color: var(--red); }
.purple-bg { background: rgba(161,66,244,0.15);  color: var(--purple-l); }
.cyan-bg   { background: rgba(77,208,225,0.15);  color: var(--cyan); }

.platform-card h4 {
    font-size: 16px; font-weight: 600; margin-bottom: 8px; color: #fff;
}
.platform-card p {
    font-size: 13px; color: var(--text3); line-height: 1.55;
}

/* ==================== ADVANTAGE GRID ==================== */
.advantage-grid {
    display: grid; grid-template-columns: repeat(2, 1fr);
    gap: 24px; margin: 36px 0;
}
.advantage-card {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--r-l); padding: 32px 28px;
    transition: all 0.3s var(--ease);
}
.advantage-card:hover {
    border-color: var(--border-h);
    transform: translateY(-4px);
    background: var(--surface2);
}
.advantage-num {
    font-size: 44px; font-weight: 700; opacity: 0.2;
    margin-bottom: 14px; line-height: 1;
}
.advantage-num.blue   { color: var(--blue); }
.advantage-num.green  { color: var(--green); }
.advantage-num.yellow { color: var(--yellow); }
.advantage-num.red    { color: var(--red); }

.advantage-card h4 {
    font-size: 20px; font-weight: 600; margin-bottom: 12px; color: #fff;
}
.advantage-card p {
    font-size: 14px; color: var(--text2); line-height: 1.7;
}
.advantage-card p strong { color: #fff; }

.bottom-statement {
    text-align: center; font-size: 18px;
    color: var(--text); max-width: 800px;
    margin: 0 auto; line-height: 1.7;
    font-weight: 500;
}
.bottom-statement strong { color: #fff; font-weight: 700; }

/* ==================== ROADMAP ==================== */
.roadmap {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 24px; margin: 36px 0; position: relative;
}
.roadmap::before {
    content: ''; position: absolute;
    top: 46px; left: 8%; right: 8%;
    height: 3px; background: var(--g-google);
    opacity: 0.25; z-index: 0; border-radius: 2px;
}
.phase {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--r-l); padding: 0 24px 24px;
    position: relative; z-index: 1;
    transition: all 0.3s var(--ease);
}
.phase:hover { border-color: var(--border-h); transform: translateY(-4px); }

.phase-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 14px 20px; margin: 0 -24px 20px;
    border-radius: var(--r-l) var(--r-l) 0 0;
    font-size: 13px; font-weight: 600;
}
.phase-label { text-transform: uppercase; letter-spacing: 0.06em; }
.phase-time { opacity: 0.8; font-weight: 500; }

.phase h4 {
    font-size: 22px; font-weight: 700; margin-bottom: 16px; color: #fff;
}
.phase ul {
    list-style: none; display: flex;
    flex-direction: column; gap: 10px; margin-bottom: 20px;
}
.phase ul li {
    font-size: 14px; color: var(--text2);
    padding-left: 20px; position: relative; line-height: 1.5;
}
.phase ul li::before {
    content: '→'; position: absolute; left: 0; color: var(--text4);
}
.phase-invest {
    font-size: 14px; font-weight: 700; color: #fff;
    padding-top: 14px; border-top: 1px solid var(--border);
}

/* ==================== ROI BANNER ==================== */
.roi-banner {
    display: flex; align-items: center; justify-content: center;
    gap: 48px;
    background: linear-gradient(135deg, rgba(66,133,244,0.08), rgba(52,168,83,0.06), rgba(251,188,4,0.05));
    border: 1px solid var(--border);
    border-radius: var(--r-l); padding: 36px 48px;
}
.roi-item { text-align: center; }
.roi-number {
    display: block; font-size: 38px; font-weight: 700;
    color: #fff; letter-spacing: -0.02em;
}
.roi-highlight {
    background: var(--g-text); background-size: 300% 100%;
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 8s ease infinite;
}
.roi-label {
    display: block; font-size: 13px; color: var(--text3);
    margin-top: 6px; font-weight: 500;
}
.roi-divider {
    width: 1px; height: 50px; background: var(--border);
}

/* ==================== SPECIAL SLIDES ==================== */
.slide-dark-accent {
    background: radial-gradient(ellipse 70% 50% at 60% 40%, rgba(52,168,83,0.08) 0%, transparent 60%),
                var(--bg) !important;
}

.slide-cta {
    background: radial-gradient(ellipse 80% 60% at 50% 50%, rgba(66,133,244,0.1) 0%, transparent 70%),
                var(--bg) !important;
}

.cta-heading {
    font-size: clamp(40px, 6vw, 76px);
    font-weight: 700; line-height: 1.08;
    letter-spacing: -0.03em; margin-bottom: 52px; color: #fff;
}

.next-steps {
    display: flex; flex-direction: column; gap: 16px;
    width: 100%; max-width: 500px; margin-bottom: 52px;
}
.step-item {
    display: flex; align-items: center; gap: 20px;
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--r); padding: 20px 24px;
    text-align: left; transition: all 0.3s var(--ease);
}
.step-item:hover {
    border-color: var(--border-h);
    transform: translateX(8px);
    background: var(--surface2);
}
.step-num {
    width: 40px; height: 40px; border-radius: 50%;
    background: rgba(66,133,244,0.15); color: var(--blue);
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 18px; flex-shrink: 0;
}
.step-item strong {
    display: block; font-size: 16px; color: #fff; margin-bottom: 3px;
}
.step-item span { font-size: 13px; color: var(--text3); }

.cta-quote {
    font-size: 20px; color: var(--text3);
    font-style: italic; margin-bottom: 36px;
    max-width: 520px; line-height: 1.5;
}
.cta-brand {
    display: flex; align-items: center; gap: 12px;
    font-size: 16px; font-weight: 500; color: var(--text3);
}

/* ==================== GOOGLE I/O KEYNOTE POLISH ==================== */
:root {
    --bg: #05060a;
    --bg-2: #0a1020;
    --surface: rgba(255,255,255,0.05);
    --surface2: rgba(255,255,255,0.09);
    --glass: rgba(255,255,255,0.07);
    --text: #f4f7fb;
    --text2: #c4cad3;
    --text3: #98a2b3;
    --text4: #728095;
    --border: rgba(255,255,255,0.08);
    --border-h: rgba(255,255,255,0.18);
    --shadow-soft: 0 20px 60px rgba(0,0,0,0.32);
    --shadow-glow: 0 0 0 1px rgba(255,255,255,0.04), 0 18px 48px rgba(0,0,0,0.32);
}

body::before,
body::after {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: -2;
}

body::before {
    background:
        radial-gradient(circle at 12% 18%, rgba(66,133,244,0.16), transparent 28%),
        radial-gradient(circle at 80% 22%, rgba(52,168,83,0.14), transparent 24%),
        radial-gradient(circle at 52% 72%, rgba(161,66,244,0.12), transparent 30%),
        radial-gradient(circle at 76% 78%, rgba(234,67,53,0.12), transparent 26%),
        linear-gradient(180deg, #070910 0%, #05060a 48%, #04050a 100%);
}

body::after {
    background-image:
        linear-gradient(rgba(255,255,255,0.022) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.022) 1px, transparent 1px);
    background-size: 72px 72px;
    mask-image: radial-gradient(circle at center, black 35%, transparent 100%);
    opacity: 0.32;
}

.presentation::before {
    content: '';
    position: fixed;
    inset: 18px;
    border-radius: 28px;
    border: 1px solid rgba(255,255,255,0.06);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.04), 0 24px 120px rgba(0,0,0,0.45);
    pointer-events: none;
    z-index: 0;
}

.presentation::after {
    content: '';
    position: fixed;
    inset: 18px;
    border-radius: 28px;
    background: linear-gradient(180deg, rgba(255,255,255,0.03), transparent 10%, transparent 90%, rgba(255,255,255,0.02));
    pointer-events: none;
    z-index: 0;
}

.slide {
    padding: clamp(76px, 8vw, 108px);
    background:
        radial-gradient(circle at top center, rgba(255,255,255,0.035), transparent 28%),
        linear-gradient(180deg, rgba(255,255,255,0.015), transparent 30%),
        var(--bg);
}

.slide::before {
    content: '';
    position: absolute;
    top: 24px;
    left: clamp(28px, 4vw, 56px);
    width: clamp(120px, 18vw, 220px);
    height: 4px;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--blue), var(--green), var(--yellow), var(--red));
    opacity: 0.92;
    box-shadow: 0 0 24px rgba(66,133,244,0.28);
}

.slide::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 0%, rgba(255,255,255,0.03), transparent 30%);
    opacity: 0;
    transition: opacity 0.8s var(--ease);
    pointer-events: none;
}

.slide.active::after {
    opacity: 1;
}

.slide:nth-child(4n + 1)::before { background: linear-gradient(90deg, var(--blue), var(--cyan), var(--purple)); }
.slide:nth-child(4n + 2)::before { background: linear-gradient(90deg, var(--green), var(--blue), var(--yellow)); }
.slide:nth-child(4n + 3)::before { background: linear-gradient(90deg, var(--yellow), #ff8a00, var(--red)); }
.slide:nth-child(4n + 4)::before { background: linear-gradient(90deg, var(--purple), var(--blue), var(--green)); }

.slide-content {
    max-width: min(1280px, calc(100vw - 160px));
    display: grid;
    gap: clamp(18px, 2.1vw, 30px);
}

.slide-title .slide-content,
.slide-cta .slide-content {
    gap: 0;
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    width: fit-content;
    padding: 10px 18px;
    border-radius: 999px;
    background: linear-gradient(135deg, rgba(66,133,244,0.16), rgba(161,66,244,0.08));
    border: 1px solid rgba(138,180,248,0.18);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.06);
    color: #d7e4ff;
}

.section-label::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
    box-shadow: 0 0 16px currentColor;
}

.slide-heading,
.cta-heading,
.title-main {
    max-width: 14ch;
    text-wrap: balance;
}

.slide-desc,
.bottom-statement,
.cta-quote,
.slide-footnote,
.comparison-callout,
.gap-statement,
.proof-banner,
.impact-statement,
.callout-box {
    max-width: min(920px, 100%);
}

.slide-desc {
    font-size: clamp(17px, 1.65vw, 21px);
    line-height: 1.78;
}

.title-badge,
.callout-box,
.proof-banner,
.comparison-callout,
.gap-statement,
.impact-statement,
.roi-banner,
.big-stat {
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    box-shadow: var(--shadow-soft);
}

.stats-grid,
.pain-grid,
.results-grid,
.agent-impact-grid,
.stack-grid,
.platform-grid,
.advantage-grid,
.roadmap,
.two-col-grid {
    gap: clamp(18px, 2vw, 28px);
}

.stat-card,
.pain-card,
.result-card,
.force-card,
.stack-card,
.agent-card,
.platform-card,
.advantage-card,
.dilemma-card,
.phase,
.step-item {
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, rgba(255,255,255,0.07), rgba(255,255,255,0.035));
    border: 1px solid rgba(255,255,255,0.09);
    box-shadow: var(--shadow-glow);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.stat-card::before,
.pain-card::before,
.result-card::before,
.force-card::before,
.stack-card::before,
.agent-card::before,
.platform-card::before,
.advantage-card::before,
.dilemma-card::before,
.phase::before,
.step-item::before {
    content: '';
    position: absolute;
    inset: 0 0 auto;
    height: 2px;
    background: linear-gradient(90deg, rgba(66,133,244,0), rgba(66,133,244,0.95), rgba(52,168,83,0.92), rgba(251,188,4,0.92), rgba(234,67,53,0));
    opacity: 0.95;
}

.stat-card:hover,
.pain-card:hover,
.result-card:hover,
.force-card:hover,
.stack-card:hover,
.agent-card:hover,
.platform-card:hover,
.advantage-card:hover,
.dilemma-card:hover,
.phase:hover,
.step-item:hover {
    transform: translateY(-6px);
    border-color: rgba(255,255,255,0.16);
    background: linear-gradient(180deg, rgba(255,255,255,0.1), rgba(255,255,255,0.045));
}

.force-blue::before,
.stack-blue::before,
.glow-blue::before,
.advantage-num.blue,
.phase-1::before {
    background: linear-gradient(90deg, rgba(66,133,244,0), rgba(66,133,244,1), rgba(77,208,225,0.96), rgba(66,133,244,0));
}

.force-green::before,
.stack-green::before,
.glow-green::before,
.advantage-num.green,
.phase-2::before {
    background: linear-gradient(90deg, rgba(52,168,83,0), rgba(52,168,83,1), rgba(129,201,149,0.96), rgba(52,168,83,0));
}

.stack-yellow::before,
.glow-yellow::before,
.advantage-num.yellow,
.phase-3::before {
    background: linear-gradient(90deg, rgba(251,188,4,0), rgba(251,188,4,1), rgba(242,139,130,0.9), rgba(251,188,4,0));
}

.glow-red::before,
.advantage-num.red,
.dilemma-con::before {
    background: linear-gradient(90deg, rgba(234,67,53,0), rgba(234,67,53,1), rgba(242,139,130,0.92), rgba(234,67,53,0));
}

.comparison-table {
    padding: 8px;
    border-radius: 30px;
    background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.02));
    border: 1px solid rgba(255,255,255,0.09);
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}

.comparison-table table {
    border-collapse: separate;
    border-spacing: 0;
    overflow: hidden;
    border-radius: 22px;
}

.comparison-table thead th {
    background: rgba(255,255,255,0.05);
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 12px;
}

.comparison-table tbody tr:nth-child(odd) td {
    background: rgba(255,255,255,0.015);
}

.comparison-table td,
.comparison-table th {
    border-color: rgba(255,255,255,0.06) !important;
}

.roi-banner {
    border-radius: 28px;
    background: linear-gradient(135deg, rgba(66,133,244,0.14), rgba(52,168,83,0.09), rgba(161,66,244,0.12));
}

.roadmap::before {
    top: 54px;
    background: linear-gradient(90deg, rgba(66,133,244,0.12), rgba(66,133,244,0.7), rgba(52,168,83,0.65), rgba(251,188,4,0.62), rgba(234,67,53,0.2));
}

.phase-header {
    border-bottom: 1px solid rgba(255,255,255,0.06);
    box-shadow: inset 0 -1px 0 rgba(255,255,255,0.02);
}

.title-main {
    text-shadow: 0 10px 40px rgba(0,0,0,0.32);
}

.keyboard-hint,
.slide-counter,
.brand-badge,
.lang-toggle {
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    background: rgba(8,10,18,0.56);
    border: 1px solid rgba(255,255,255,0.08);
    box-shadow: var(--shadow-soft);
}

.keyboard-hint,
.slide-counter,
.brand-badge {
    padding: 10px 14px;
    border-radius: 999px;
}

.slide-counter {
    right: 30px;
    bottom: 24px;
}

.brand-badge {
    top: 22px;
    left: 24px;
}

.dot-nav {
    right: 22px;
    padding: 12px 10px;
    border-radius: 999px;
    background: rgba(8,10,18,0.46);
    border: 1px solid rgba(255,255,255,0.08);
    box-shadow: var(--shadow-soft);
}

.dot-nav .dot {
    width: 9px;
    height: 9px;
}

.dot-nav .dot.active {
    height: 28px;
    box-shadow: 0 0 18px rgba(66,133,244,0.65);
}

.lang-toggle {
    position: fixed;
    top: 20px;
    right: 26px;
    z-index: 120;
    min-width: 60px;
    padding: 10px 14px;
    border-radius: 999px;
    color: #fff;
    font: 600 13px/1 var(--font);
    letter-spacing: 0.04em;
    cursor: pointer;
    transition: transform 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.lang-toggle:hover {
    transform: translateY(-2px);
    border-color: rgba(255,255,255,0.16);
    background: rgba(16,18,28,0.72);
}

.lang-toggle:focus-visible {
    outline: 2px solid rgba(138,180,248,0.88);
    outline-offset: 3px;
}

.slide-title::before,
.slide-cta::before {
    width: clamp(160px, 22vw, 260px);
}

/* ==================== LANGUAGE TOGGLE ==================== */
.lang-toggle {
    position: fixed;
    top: 20px;
    right: 80px;
    z-index: 200;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    color: var(--text);
    font-family: var(--font);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.04em;
    padding: 6px 16px;
    border-radius: 100px;
    cursor: pointer;
    transition: all 0.3s var(--ease);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.lang-toggle:hover {
    background: rgba(66,133,244,0.2);
    border-color: rgba(66,133,244,0.4);
    transform: scale(1.05);
}
.lang-toggle:active {
    transform: scale(0.97);
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 1100px) {
    .slide { padding: 60px 40px; }
    .stats-grid, .pain-grid, .results-grid, .agent-impact-grid { grid-template-columns: repeat(2, 1fr); }
    .stack-grid, .platform-grid, .roadmap { grid-template-columns: 1fr; }
    .advantage-grid { grid-template-columns: 1fr; }
    .roadmap::before { display: none; }
    .dot-nav { display: none; }
    .presentation::before,
    .presentation::after { inset: 10px; border-radius: 22px; }
    .slide-content { max-width: calc(100vw - 80px); }
}

@media (max-width: 768px) {
    .slide { padding: 40px 24px; }
    .two-col-grid { grid-template-columns: 1fr; }
    .stats-grid, .pain-grid, .results-grid, .agent-impact-grid { grid-template-columns: 1fr; }
    .roi-banner { flex-direction: column; gap: 24px; padding: 28px 20px; }
    .roi-divider { width: 60px; height: 1px; }
    .slide-counter { right: 16px; bottom: 16px; font-size: 12px; }
    .brand-badge { left: 16px; top: 12px; font-size: 12px; }
    .keyboard-hint { display: none; }
    .comparison-table { font-size: 12px; }
    .comparison-table th, .comparison-table td { padding: 10px 12px; }
    .presentation::before,
    .presentation::after { inset: 0; border-radius: 0; }
    .slide::before { left: 24px; top: 18px; width: 120px; }
    .brand-badge,
    .slide-counter,
    .lang-toggle { padding: 8px 12px; }
    .lang-toggle { top: 12px; right: 16px; }
    .slide-content { max-width: 100%; }
}

/* ==================== PRINT ==================== */
@media print {
    .slide {
        position: relative; min-height: auto;
        opacity: 1 !important; transform: none !important;
        page-break-after: always; padding: 40px;
        pointer-events: auto;
    }
    .progress-bar, .slide-counter, .dot-nav, .keyboard-hint,
    .brand-badge, .scroll-indicator, .slide-bg-orbs { display: none; }
    .animate-in { opacity: 1 !important; transform: none !important; }
    body, html { background: #fff; color: #1a1a1a; overflow: visible; height: auto; }
    .presentation { height: auto; overflow: visible; }
    .gradient-text { -webkit-text-fill-color: #4285F4; background: none; }
}