/* ===========================================
   FROM TOOLS TO CAPABILITY
   What Actually Drives AI Adoption
   Bold creative energy. Warm gradients on deep dark.
   =========================================== */

/* ===========================================
   FONTS
   Syne for display — bold, geometric, futuristic
   DM Sans for body — clean, warm, readable
   JetBrains Mono for code accents
   =========================================== */
@import url('https://fonts.googleapis.com/css2?family=Syne:wght@500;600;700;800&family=DM+Sans:ital,wght@0,400;0,500;0,600;1,400&family=JetBrains+Mono:wght@400;500&display=swap');

/* ===========================================
   CSS CUSTOM PROPERTIES
   =========================================== */
:root {
    /* Core backgrounds — deep indigo-charcoal */
    --bg-primary: #0c0a1a;
    --bg-secondary: #13112a;
    --bg-tertiary: #1c1938;
    --bg-card: rgba(28, 25, 56, 0.8);

    /* Text hierarchy */
    --text-primary: #f5f0ff;
    --text-secondary: #b8b0d0;
    --text-muted: #7a7294;

    /* Accent — warm coral/orange */
    --accent: #ff6b35;
    --accent-bright: #ff8c5a;
    --accent-dim: #cc5529;
    --accent-glow: rgba(255, 107, 53, 0.3);

    /* Secondary — vivid purple */
    --purple: #7c3aed;
    --purple-bright: #9f67ff;
    --purple-glow: rgba(124, 58, 237, 0.25);

    /* Tertiary — electric teal for code/data */
    --teal: #2dd4bf;
    --teal-glow: rgba(45, 212, 191, 0.2);

    /* Warm yellow for highlights */
    --yellow: #fbbf24;

    /* Borders */
    --border: rgba(245, 240, 255, 0.08);
    --border-active: rgba(255, 107, 53, 0.4);

    /* Typography */
    --font-display: 'Syne', sans-serif;
    --font-body: 'DM Sans', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Spacing */
    --slide-padding: clamp(2rem, 5vw, 5rem);
    --content-max-width: 1200px;

    /* Animation */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out-back: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-spring: cubic-bezier(0.22, 1.35, 0.55, 1);
    --duration-fast: 0.3s;
    --duration-normal: 0.6s;
    --duration-slow: 1s;
    --duration-dramatic: 1.4s;
}

/* ===========================================
   RESET & BASE
   =========================================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-snap-type: y mandatory;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scrollbar-width: none;
}

body::-webkit-scrollbar {
    display: none;
}

/* ===========================================
   ATMOSPHERIC BACKGROUND
   Warm gradient mesh with floating orbs
   =========================================== */
.atmosphere {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background:
        radial-gradient(ellipse 80% 60% at 10% 90%, rgba(255, 107, 53, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse 60% 50% at 90% 10%, rgba(124, 58, 237, 0.07) 0%, transparent 50%),
        radial-gradient(ellipse 70% 70% at 50% 50%, rgba(45, 212, 191, 0.03) 0%, transparent 50%);
}

.atmosphere::before,
.atmosphere::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    animation: float 20s ease-in-out infinite;
}

.atmosphere::before {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 107, 53, 0.08), transparent 70%);
    top: -200px;
    right: -100px;
    animation-delay: -5s;
}

.atmosphere::after {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.07), transparent 70%);
    bottom: -150px;
    left: -100px;
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -40px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(15px, 30px) scale(1.02); }
}

/* ===========================================
   PROGRESS INDICATOR
   =========================================== */
.progress-indicator {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--purple));
    width: 0%;
    z-index: 1000;
    transition: width var(--duration-fast) ease-out;
    box-shadow: 0 0 12px var(--accent-glow);
}

/* ===========================================
   SLIDE COUNTER
   =========================================== */
.slide-counter {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-muted);
    z-index: 100;
    font-variant-numeric: tabular-nums;
}

.slide-counter .current {
    color: var(--accent);
    font-weight: 500;
}

/* ===========================================
   NAVIGATION DOTS
   =========================================== */
.nav-dots {
    position: fixed;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    z-index: 100;
}

.nav-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
    border: none;
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out-expo);
    opacity: 0.3;
}

.nav-dot:hover {
    opacity: 0.6;
    transform: scale(1.3);
}

.nav-dot.active {
    opacity: 1;
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent-glow);
    transform: scale(1.2);
}

/* ===========================================
   SLIDE CONTAINER
   =========================================== */
.slide {
    height: 100vh;
    padding: var(--slide-padding);
    scroll-snap-align: start;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.slide-content {
    max-width: var(--content-max-width);
    margin: 0 auto;
    width: 100%;
}

/* ===========================================
   TYPOGRAPHY
   =========================================== */
h1 {
    font-family: var(--font-display);
    font-size: clamp(3rem, 7vw, 5.5rem);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin-bottom: 1.25rem;
}

h2 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4.5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

h3 {
    font-family: var(--font-display);
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    font-weight: 600;
    line-height: 1.25;
    margin-bottom: 0.75rem;
}

p {
    font-size: clamp(1rem, 1.5vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 52ch;
    line-height: 1.6;
}

/* ===========================================
   GRADIENT ACCENTS
   =========================================== */
.gradient-text {
    background: linear-gradient(135deg, var(--accent), var(--purple-bright));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.gradient-text-warm {
    background: linear-gradient(135deg, var(--yellow), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.accent { color: var(--accent); }
.purple { color: var(--purple-bright); }
.teal { color: var(--teal); }
.yellow { color: var(--yellow); }
.muted { color: var(--text-muted); }

/* ===========================================
   TITLE SLIDE
   =========================================== */
.title-slide {
    text-align: center;
    background:
        radial-gradient(ellipse 50% 60% at 50% 45%, rgba(124, 58, 237, 0.1) 0%, transparent 60%),
        radial-gradient(ellipse 60% 40% at 30% 70%, rgba(255, 107, 53, 0.08) 0%, transparent 50%);
}

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

.title-slide h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    margin-bottom: 1.5rem;
}

.title-slide .date {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-top: 3rem;
    letter-spacing: 0.02em;
}

/* Deck label / tag */
.deck-label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    background: rgba(255, 107, 53, 0.1);
    border: 1px solid rgba(255, 107, 53, 0.25);
    border-radius: 100px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 2rem;
    width: fit-content;
}

.deck-label::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.7); }
}

.subtitle {
    font-size: clamp(1.15rem, 2vw, 1.5rem);
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    max-width: 40ch;
}

/* ===========================================
   SECTION / STANZA INTRO SLIDE
   =========================================== */
.section-slide {
    text-align: center;
    background: linear-gradient(160deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

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

.section-number {
    font-family: var(--font-display);
    font-size: clamp(6rem, 15vw, 12rem);
    font-weight: 800;
    background: linear-gradient(180deg, var(--accent), transparent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.2;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.act-label {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 1rem;
}

/* Section slide subtitle */
.section-subtitle {
    font-size: clamp(1.05rem, 1.8vw, 1.35rem);
    color: var(--text-secondary);
    max-width: 42ch;
    line-height: 1.55;
    margin-top: 0.5rem;
}

/* ===========================================
   CONTENT CARDS
   =========================================== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.75rem;
    transition: border-color var(--duration-fast) ease,
                transform var(--duration-fast) var(--ease-out-expo),
                box-shadow var(--duration-fast) ease;
    backdrop-filter: blur(8px);
}

.card:hover {
    border-color: var(--border-active);
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(255, 107, 53, 0.08);
}

.card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.card p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.55;
}

/* Card accent top border */
.card-accent {
    border-top: 2px solid var(--accent);
}

.card-purple {
    border-top: 2px solid var(--purple);
}

.card-teal {
    border-top: 2px solid var(--teal);
}

.card-yellow {
    border-top: 2px solid var(--yellow);
}

/* Card grid layouts */
.card-grid {
    display: grid;
    gap: 1.25rem;
}

.card-grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.card-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

/* ===========================================
   STAT / CALLOUT BLOCKS
   =========================================== */
.stat-block {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.stat-number {
    font-family: var(--font-display);
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 800;
    line-height: 1;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* Big quote / callout */
.callout {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3.5vw, 2.75rem);
    font-weight: 600;
    line-height: 1.25;
    letter-spacing: -0.01em;
    max-width: 22ch;
    position: relative;
    padding-left: 1.5rem;
    border-left: 3px solid var(--accent);
}

.callout em {
    font-style: italic;
    color: var(--accent-bright);
}

/* Centered callout variant */
.callout-center {
    text-align: center;
    border-left: none;
    padding-left: 0;
    max-width: 30ch;
    margin: 0 auto;
}

/* ===========================================
   PILL / TAG ELEMENTS
   =========================================== */
.pill {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.75rem;
    border-radius: 100px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.02em;
}

.pill-accent {
    background: rgba(255, 107, 53, 0.12);
    color: var(--accent);
    border: 1px solid rgba(255, 107, 53, 0.25);
}

.pill-purple {
    background: rgba(124, 58, 237, 0.12);
    color: var(--purple-bright);
    border: 1px solid rgba(124, 58, 237, 0.25);
}

.pill-teal {
    background: rgba(45, 212, 191, 0.12);
    color: var(--teal);
    border: 1px solid rgba(45, 212, 191, 0.25);
}

.pill-yellow {
    background: rgba(251, 191, 36, 0.12);
    color: var(--yellow);
    border: 1px solid rgba(251, 191, 36, 0.25);
}

/* ===========================================
   HORIZONTAL RULE / DIVIDER
   =========================================== */
.divider {
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--purple));
    border: none;
    border-radius: 2px;
    margin: 1.5rem 0;
}

/* ===========================================
   CAPABILITY PREVIEW (opening slide)
   =========================================== */
.capability-preview {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-top: 2.5rem;
}

.capability-item {
    text-align: center;
    padding: 1.25rem 0.75rem;
    border-radius: 12px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    transition: border-color var(--duration-fast) ease;
}

.capability-item:hover {
    border-color: var(--border-active);
}

.capability-icon {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
    display: block;
}

.capability-name {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.capability-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.4;
}

/* ===========================================
   ICON CIRCLES
   =========================================== */
.icon-circle {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.icon-circle-accent {
    background: rgba(255, 107, 53, 0.12);
    border: 1px solid rgba(255, 107, 53, 0.25);
}

.icon-circle-purple {
    background: rgba(124, 58, 237, 0.12);
    border: 1px solid rgba(124, 58, 237, 0.25);
}

.icon-circle-teal {
    background: rgba(45, 212, 191, 0.12);
    border: 1px solid rgba(45, 212, 191, 0.25);
}

/* ===========================================
   CLOSE / CTA SECTION
   =========================================== */
.cta-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    counter-reset: cta;
}

.cta-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    counter-increment: cta;
}

.cta-number {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--purple));
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

.cta-text {
    font-size: 1.15rem;
    color: var(--text-primary);
    line-height: 1.5;
}

.cta-text em {
    color: var(--accent-bright);
    font-style: normal;
    font-weight: 500;
}

/* ===========================================
   REVEAL ANIMATIONS
   =========================================== */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity var(--duration-normal) var(--ease-out-expo),
                transform var(--duration-normal) var(--ease-out-expo);
}

.slide.visible .reveal {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children */
.reveal:nth-child(1) { transition-delay: 0.05s; }
.reveal:nth-child(2) { transition-delay: 0.15s; }
.reveal:nth-child(3) { transition-delay: 0.25s; }
.reveal:nth-child(4) { transition-delay: 0.35s; }
.reveal:nth-child(5) { transition-delay: 0.45s; }
.reveal:nth-child(6) { transition-delay: 0.55s; }

/* Scale in — for cards and blocks */
.reveal-scale {
    opacity: 0;
    transform: scale(0.92);
    transition: opacity var(--duration-normal) var(--ease-out-expo),
                transform var(--duration-normal) var(--ease-out-back);
}

.slide.visible .reveal-scale {
    opacity: 1;
    transform: scale(1);
}

.reveal-scale:nth-child(1) { transition-delay: 0.05s; }
.reveal-scale:nth-child(2) { transition-delay: 0.15s; }
.reveal-scale:nth-child(3) { transition-delay: 0.25s; }
.reveal-scale:nth-child(4) { transition-delay: 0.35s; }

/* Blur in — for dramatic text */
.reveal-blur {
    opacity: 0;
    filter: blur(12px);
    transform: translateY(10px);
    transition: opacity var(--duration-slow) var(--ease-out-expo),
                filter var(--duration-slow) var(--ease-out-expo),
                transform var(--duration-slow) var(--ease-out-expo);
}

.slide.visible .reveal-blur {
    opacity: 1;
    filter: blur(0);
    transform: translateY(0);
}

/* Slide from left */
.reveal-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity var(--duration-normal) var(--ease-out-expo),
                transform var(--duration-normal) var(--ease-out-expo);
}

.slide.visible .reveal-left {
    opacity: 1;
    transform: translateX(0);
}

.reveal-left:nth-child(1) { transition-delay: 0.1s; }
.reveal-left:nth-child(2) { transition-delay: 0.2s; }
.reveal-left:nth-child(3) { transition-delay: 0.3s; }

/* ===========================================
   ANIMATED GRADIENT BORDER
   =========================================== */
.gradient-border {
    position: relative;
    border-radius: 16px;
    padding: 2px;
    background: linear-gradient(135deg, var(--accent), var(--purple), var(--teal));
    background-size: 200% 200%;
    animation: gradient-shift 6s ease infinite;
}

.gradient-border-inner {
    background: var(--bg-secondary);
    border-radius: 14px;
    padding: 2rem;
}

@keyframes gradient-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* ===========================================
   RESPONSIVE
   =========================================== */
@media (max-width: 768px) {
    .nav-dots {
        display: none;
    }

    .card-grid-2,
    .card-grid-3 {
        grid-template-columns: 1fr;
    }

    .capability-preview {
        grid-template-columns: repeat(2, 1fr);
    }

    .slide-counter {
        bottom: 1rem;
        left: 1rem;
    }
}

/* ===========================================
   REDUCED MOTION
   =========================================== */
@media (prefers-reduced-motion: reduce) {
    .reveal,
    .reveal-scale,
    .reveal-blur,
    .reveal-left {
        transition: opacity 0.3s ease;
        transform: none;
        filter: none;
    }

    .atmosphere::before,
    .atmosphere::after {
        animation: none;
    }

    .gradient-border {
        animation: none;
    }
}