/* =========================================
   DigitalEcho Design System v2.0
   Award-Quality • Premium • Refined
   ========================================= */

/* --- Custom Properties (Light Default) --- */
:root {
    /* Primary Palette */
    --color-primary: #004aac;
    /* Brand Blue */
    --color-primary-light: #0066cc;
    --color-primary-dark: #003380;
    --color-accent: #00c8ff;
    /* Electric Cyan */
    --color-accent-glow: rgba(0, 200, 255, 0.15);

    /* Neutrals */
    --color-bg: #ffffff;
    --color-bg-alt: #f7f9fc;
    --color-bg-elevated: #ffffff;
    --color-surface: #ffffff;
    --color-text: #0f172a;
    --color-text-muted: #64748b;
    --color-border: #e2e8f0;

    /* Shadows & Effects */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 40px rgba(0, 74, 172, 0.15);

    /* Typography */
    --font-sans: 'Inter', ui-sans-serif, system-ui, -apple-system, sans-serif;
    --font-display: 'Inter', ui-sans-serif, system-ui, sans-serif;

    /* Spacing */
    --header-height: 80px;
    --section-padding: clamp(4rem, 10vw, 8rem);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Dark Mode --- */
[data-theme="dark"] {
    --color-bg: #030712;
    --color-bg-alt: #0f172a;
    --color-bg-elevated: #1e293b;
    --color-surface: #1e293b;
    --color-text: #f8fafc;
    --color-text-muted: #94a3b8;
    --color-border: #334155;
    --color-accent-glow: rgba(0, 200, 255, 0.25);
    --shadow-glow: 0 0 60px rgba(0, 200, 255, 0.1);
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-family: var(--font-sans);
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    transition: background-color var(--transition-slow), color var(--transition-slow);
    overflow-x: hidden;
}

img,
svg {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-accent);
}

/* --- Typography --- */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

[data-theme="dark"] h1 {
    background: linear-gradient(135deg, #fff 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin-bottom: 1rem;
}

h3 {
    font-size: clamp(1.25rem, 2vw, 1.5rem);
    margin-bottom: 0.75rem;
}

.lead {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    color: var(--color-text-muted);
    max-width: 60ch;
    line-height: 1.8;
}

.eyebrow {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-accent);
    margin-bottom: 0.75rem;
}

.text-muted {
    color: var(--color-text-muted);
}

.text-small {
    font-size: 0.875rem;
}

/* --- Layout --- */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 clamp(1rem, 5vw, 2rem);
}

.section {
    padding: var(--section-padding) 0;
}

.grid {
    display: grid;
    gap: 2rem;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
}

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

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.flex {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.flex-col {
    flex-direction: column;
    align-items: flex-start;
}

.justify-between {
    justify-content: space-between;
}

.justify-center {
    justify-content: center;
}

.items-center {
    align-items: center;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(255, 255, 255, 0.1) 100%);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.btn:hover::before {
    opacity: 1;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #fff;
    box-shadow: 0 4px 14px rgba(0, 74, 172, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 74, 172, 0.4);
    color: #fff;
}

.btn-secondary {
    background: transparent;
    border: 2px solid var(--color-border);
    color: var(--color-text);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
}

/* Light mode hero secondary button - white for visibility */
[data-theme="light"] .hero-content .btn-secondary {
    border-color: rgba(255, 255, 255, 0.6);
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

[data-theme="light"] .hero-content .btn-secondary:hover {
    border-color: #fff;
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
}

.btn-ghost {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
    color: #fff;
}

/* --- Header --- */
header {
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

[data-theme="dark"] header {
    background: rgba(3, 7, 18, 0.85);
}

.nav-container {
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo svg,
.logo img {
    height: 40px;
    width: auto;
}

.logo-text {
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--color-primary);
    letter-spacing: -0.03em;
}

[data-theme="dark"] .logo-text {
    color: #fff;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav-link {
    font-weight: 500;
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    position: relative;
    padding: 0.25rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-text);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Theme Toggle */
.theme-toggle {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    cursor: pointer;
    font-size: 1.25rem;
    transition: all var(--transition-base);
}

.theme-toggle:hover {
    background: var(--color-border);
    transform: rotate(15deg);
}

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    width: 44px;
    height: 44px;
    background: transparent;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-text);
}

/* --- Hero Sections --- */
.hero {
    position: relative;
    min-height: 85vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: left center;
    z-index: -2;
    filter: brightness(1.1) contrast(1.05);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    z-index: -1;
}

[data-theme="light"] .hero-overlay {
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.4) 0%, rgba(0, 0, 0, 0.25) 50%, rgba(0, 0, 0, 0.15) 100%);
}

[data-theme="dark"] .hero-overlay {
    background: linear-gradient(135deg, rgba(3, 7, 18, 0.85) 0%, rgba(3, 7, 18, 0.65) 50%, rgba(3, 7, 18, 0.4) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 720px;
}

.hero-content h1 {
    margin-bottom: 1.5rem;
}

/* Light mode hero text - white for dark overlay */
[data-theme="light"] .hero-content h1 {
    color: #fff !important;
    -webkit-text-fill-color: #fff;
    background: none;
}

[data-theme="light"] .hero-content .eyebrow {
    color: var(--color-accent);
}

[data-theme="light"] .hero-content .lead,
[data-theme="light"] .hero-content p {
    color: rgba(255, 255, 255, 0.9);
}

.hero-content .lead {
    margin-bottom: 2.5rem;
    color: var(--color-text);
    opacity: 0.9;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* --- Cards --- */
.card {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.card:hover::before {
    opacity: 1;
}

.card-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-accent-glow), transparent);
    border-radius: 12px;
    font-size: 1.75rem;
    margin-bottom: 1.25rem;
}

/* Glassmorphism Card Variant */
.card-glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

[data-theme="dark"] .card-glass {
    background: rgba(30, 41, 59, 0.6);
    border-color: rgba(255, 255, 255, 0.1);
}

/* --- Forms --- */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    font-family: inherit;
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: 10px;
    color: var(--color-text);
    transition: all var(--transition-base);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px var(--color-accent-glow);
}

.form-input::placeholder {
    color: var(--color-text-muted);
}

/* --- Sections --- */
.section-alt {
    background: var(--color-bg-alt);
}

.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 4rem;
}

.section-header-wide {
    max-width: 900px;
}

@media (min-width: 900px) {
    .section-header-wide h2 {
        white-space: nowrap;
    }
}

/* Industry List */
.industry-list {
    list-style: none;
    display: grid;
    gap: 0.875rem;
}

.industry-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0;
}

.industry-list .check {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-glow);
    color: var(--color-primary);
    border-radius: 6px;
    font-weight: 700;
}

/* Feature Highlight Box */
.highlight-box {
    background: linear-gradient(135deg, var(--color-accent-glow), transparent);
    border-left: 4px solid var(--color-accent);
    padding: 1.5rem;
    border-radius: 0 12px 12px 0;
    margin: 2rem 0;
}

.highlight-box h4 {
    margin-bottom: 0.5rem;
    color: var(--color-primary);
}

[data-theme="dark"] .highlight-box h4 {
    color: var(--color-accent);
}

/* --- Social Proof Bar --- */
.social-proof-bar {
    padding: 2rem 0;
    background: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
}

.proof-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    flex-wrap: wrap;
    opacity: 0.6;
}

.proof-logos span {
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* --- FAQ Accordion --- */
details {
    border-bottom: 1px solid var(--color-border);
}

details summary {
    padding: 1.25rem 0;
    font-weight: 600;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

details summary::after {
    content: '+';
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--color-text-muted);
    transition: transform var(--transition-base);
}

details[open] summary::after {
    transform: rotate(45deg);
}

details p {
    padding-bottom: 1.25rem;
    color: var(--color-text-muted);
}

/* --- Footer --- */
footer {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    padding: 5rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-brand .lead {
    font-size: 0.9375rem;
    margin-top: 1rem;
}

.footer-links h4 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: 1.25rem;
}

.footer-links ul {
    list-style: none;
    display: grid;
    gap: 0.75rem;
}

.footer-links a {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
}

.footer-links a:hover {
    color: var(--color-text);
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* --- Animations --- */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
        transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in:nth-child(2) {
    transition-delay: 0.1s;
}

.fade-in:nth-child(3) {
    transition-delay: 0.2s;
}

.fade-in:nth-child(4) {
    transition-delay: 0.3s;
}

/* Hover Lift */
.hover-lift {
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hover-lift:hover {
    transform: translateY(-4px);
}

/* --- Speaker Page Specific --- */
.speaker-hero {
    min-height: 90vh;
}

.speaker-hero .hero-overlay {
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.6) 50%, rgba(0, 0, 0, 0.3) 100%) !important;
}

.speaker-hero h1 {
    color: #fff !important;
    -webkit-text-fill-color: #fff;
    background: none;
    font-size: clamp(3rem, 8vw, 5rem);
}

.speaker-hero .name-break,
.speaker-hero .desktop-break,
.speaker-hero .mobile-break {
    display: block;
}

.speaker-hero .mobile-break {
    display: none;
}

.speaker-hero .eyebrow {
    color: var(--color-accent);
}

.speaker-hero .lead {
    color: rgba(255, 255, 255, 0.85);
    max-width: 60ch;
    line-height: 1.6;
}

.speaker-hero .lead-line-1 {
    white-space: nowrap;
}

.speaker-ethics-title {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
}

@media (min-width: 1024px) {
    .speaker-ethics-title {
        white-space: nowrap;
    }
}

.speaker-image {
    border-radius: 16px;
    box-shadow: var(--shadow-xl);
    border: 4px solid rgba(255, 255, 255, 0.1);
    transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}

.speaker-image:hover {
    transform: scale(1.07) translateY(-4px);
    box-shadow:
        0 30px 60px -15px rgba(0, 0, 0, 0.3),
        0 0 40px rgba(0, 200, 255, 0.1);
}

/* Speaker Hero Two-Column Layout */
.speaker-hero-container {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: 4rem;
    align-items: center;
    min-height: 80vh;
}

.speaker-hero-container > * {
    min-width: 0;
}

.speaker-hero-portrait {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.speaker-portrait-img {
    max-height: 100vh;
    width: auto;
    max-width: 100%;
    border-radius: 24px;
    box-shadow:
        0 25px 50px -12px rgba(0, 0, 0, 0.5),
        0 0 60px rgba(0, 200, 255, 0.15);
    border: 3px solid rgba(255, 255, 255, 0.1);
    object-fit: cover;
    transform: scale(1.15);
    transform-origin: center left;
    transition: transform var(--transition-slow), box-shadow var(--transition-slow), filter var(--transition-slow);
    filter: brightness(1.3) contrast(1.05);
}

.speaker-portrait-img:hover {
    transform: scale(1.18) translateY(-4px);
    box-shadow:
        0 30px 60px -15px rgba(0, 0, 0, 0.6),
        0 0 80px rgba(0, 200, 255, 0.2);
}

/* Portrait decorative glow effect */
.speaker-hero-portrait::before {
    content: '';
    position: absolute;
    width: 80%;
    height: 80%;
    background: radial-gradient(ellipse at center, rgba(0, 200, 255, 0.2) 0%, transparent 70%);
    filter: blur(40px);
    z-index: -1;
    animation: portraitGlow 4s ease-in-out infinite alternate;
}

@keyframes portraitGlow {
    0% {
        opacity: 0.5;
        transform: scale(0.95);
    }

    100% {
        opacity: 0.8;
        transform: scale(1.05);
    }
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }

    .footer-brand {
        grid-column: span 2;
    }

    .speaker-hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
        padding-top: 2rem;
    }

    .speaker-hero .hero-content {
        max-width: 100%;
    }

    .speaker-hero .hero-actions {
        justify-content: center;
    }

    .speaker-hero .lead {
        max-width: 100%;
    }

    .speaker-hero .lead-line-1 {
        white-space: normal;
    }

    .speaker-hero-portrait {
        margin-bottom: 2.5rem;
    }

    .speaker-portrait-img {
        max-height: 80vh;
        transform: none;
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--color-bg);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-150%);
        transition: transform var(--transition-base);
        box-shadow: var(--shadow-lg);
    }

    .nav-links.active {
        transform: translateY(0);
    }

    .nav-link {
        font-size: 1.125rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-brand {
        grid-column: auto;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }

    .hero {
        min-height: 70vh;
    }

    .hero-bg {
        object-position: center;
    }

    .hero-actions {
        flex-direction: column;
        margin-bottom: 2rem;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .speaker-hero h1,
    .speaker-hero .lead {
        white-space: normal;
    }

    .speaker-hero .desktop-break {
        display: none;
    }

    .speaker-hero .mobile-break {
        display: block;
    }
}

/* --- Utility: Visually Hidden --- */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}