/* 
 * VoxSentix AI - Core Stylesheet
 * Aesthetic: Futuristic Dark/Light Control Deck, Mesh Gradients, High-Tech Accents
 */

:root {
    /* Color Palette */
    --primary-hue: 260;
    --secondary-hue: 185;
    --primary-color: hsl(var(--primary-hue), 85%, 62%);
    --primary-hover: hsl(var(--primary-hue), 85%, 55%);
    --secondary-color: hsl(var(--secondary-hue), 90%, 48%);
    --secondary-hover: hsl(var(--secondary-hue), 90%, 40%);
    
    /* Semantics */
    --success-color: #10b981;
    --danger-color: #f43f5e;
    --warning-color: #f59e0b;
    
    /* Theme: Light */
    --bg-color: hsl(220, 30%, 96%);
    --bg-gradient: radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.07) 0%, transparent 45%),
                   radial-gradient(circle at 90% 80%, rgba(6, 182, 212, 0.07) 0%, transparent 45%);
    --surface-color: rgba(255, 255, 255, 0.7);
    --surface-hover: rgba(255, 255, 255, 0.88);
    --surface-solid: #ffffff;
    --text-main: hsl(224, 47%, 11%);
    --text-muted: hsl(215, 16%, 42%);
    --border-color: rgba(99, 102, 241, 0.08);
    --border-hover: rgba(99, 102, 241, 0.16);
    
    /* Shadows & Blurs */
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.015);
    --shadow-md: 0 10px 30px -10px rgba(0, 0, 0, 0.04), 0 1px 3px rgba(0, 0, 0, 0.015);
    --shadow-lg: 0 30px 60px -15px rgba(0, 0, 0, 0.07), 0 0 1px rgba(99, 102, 241, 0.04);
    --glass-blur: blur(20px);
    
    /* Transitions & Borders */
    --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --border-radius-sm: 12px;
    --border-radius-md: 22px;
    --border-radius-lg: 32px;
}

[data-theme="dark"] {
    /* Theme: Dark */
    --bg-color: hsl(222, 47%, 4%);
    --bg-gradient: radial-gradient(circle at 15% 15%, rgba(99, 102, 241, 0.12) 0%, transparent 50%),
                   radial-gradient(circle at 85% 85%, rgba(6, 182, 212, 0.11) 0%, transparent 50%);
    --surface-color: rgba(15, 23, 42, 0.6);
    --surface-hover: rgba(15, 23, 42, 0.82);
    --surface-solid: #0f172a;
    --text-main: hsl(210, 40%, 98%);
    --text-muted: hsl(215, 20%, 65%);
    --border-color: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.13);
    
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 30px 60px -15px rgba(0, 0, 0, 0.7);
}

/* Base resets */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    background-image: var(--bg-gradient);
    color: var(--text-main);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: background-color 0.6s ease, color 0.3s ease;
    overflow-x: hidden;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 6%;
    background-color: var(--surface-color);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: var(--transition);
}

.nav-brand {
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--text-main);
    letter-spacing: -1px;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    cursor: default;
}

.brand-icon {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-size: 1.9rem;
    animation: pulseIcon 3s ease-in-out infinite alternate;
    display: inline-block;
}

@keyframes pulseIcon {
    from { transform: scale(1) rotate(0deg); }
    to { transform: scale(1.15) rotate(15deg); }
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 1.75rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    position: relative;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--primary-color);
    background-color: var(--border-color);
}

/* Theme Toggle Button */
.theme-toggle-btn {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    position: relative;
    box-shadow: var(--shadow-sm);
}

.theme-toggle-btn:hover {
    background: var(--surface-hover);
    border-color: var(--primary-color);
    transform: scale(1.05);
}

.theme-icon {
    width: 20px;
    height: 20px;
    transition: var(--transition);
    position: absolute;
}

.sun-icon {
    opacity: 1;
    transform: rotate(0) scale(1);
    color: var(--warning-color);
}

.moon-icon {
    opacity: 0;
    transform: rotate(90deg) scale(0);
    color: var(--primary-color);
}

[data-theme="dark"] .sun-icon {
    opacity: 0;
    transform: rotate(-90deg) scale(0);
}

[data-theme="dark"] .moon-icon {
    opacity: 1;
    transform: rotate(0) scale(1);
}

/* Main Container */
.container {
    flex: 1;
    padding: 4rem 6%;
    max-width: 1240px;
    margin: 0 auto;
    width: 100%;
}

.section {
    display: none;
}

.section.active-section {
    display: block;
    animation: slideUpFade 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slideUpFade {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Home Section split layout */
.hero-split {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 3.5rem;
    align-items: center;
    margin-bottom: 5rem;
}

.hero-content-left {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.system-badge {
    background: var(--border-color);
    color: var(--primary-color);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    text-transform: uppercase;
    border: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: 4rem;
    line-height: 1.1;
    font-weight: 900;
    margin-bottom: 1.5rem;
    letter-spacing: -2px;
    text-align: left;
}

.text-gradient {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    line-height: 1.6;
    text-align: left;
}

.cta-button {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: white;
    border: none;
    padding: 1.1rem 2.75rem;
    font-size: 1.05rem;
    font-weight: 700;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 10px 25px -5px rgba(99, 102, 241, 0.35);
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 30px -5px rgba(99, 102, 241, 0.45);
}

.cta-arrow {
    transition: var(--transition);
}

.cta-button:hover .cta-arrow {
    transform: translateX(5px);
}

/* Metric deck visual card */
.hero-visual-right {
    display: flex;
    justify-content: center;
    align-items: center;
}

.metric-deck-card {
    width: 100%;
    background: var(--surface-color);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 2.25rem;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

.metric-deck-card:hover {
    transform: translateY(-5px) scale(1.02);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-lg);
}

.deck-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.25rem;
    margin-bottom: 1.5rem;
}

.deck-dot {
    width: 10px;
    height: 10px;
    background-color: var(--success-color);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--success-color);
    animation: blink 2s infinite alternate;
}

@keyframes blink {
    from { opacity: 0.4; }
    to { opacity: 1; }
}

.deck-title {
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--text-muted);
}

.deck-stats {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-line {
    display: flex;
    justify-content: space-between;
    font-size: 0.95rem;
}

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

.stat-val {
    font-weight: 700;
}

.green-text {
    color: var(--success-color);
}

.deck-graph-mock {
    height: 60px;
    display: flex;
    align-items: flex-end;
    gap: 8px;
    background: rgba(99, 102, 241, 0.03);
    padding: 10px;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
}

.bar-mock {
    flex: 1;
    background: linear-gradient(to top, var(--primary-color), var(--secondary-color));
    border-radius: 3px;
    transition: height 0.5s ease;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature-card {
    background: var(--surface-color);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: 2.5rem;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    background: var(--surface-hover);
    border-color: var(--border-hover);
}

.feature-icon {
    font-size: 2.25rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--border-color);
    border-radius: 16px;
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-main);
    font-weight: 700;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Analyze Section */
.analyze-container {
    max-width: 760px;
    margin: 0 auto;
}

.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 4.5rem 2rem;
    text-align: center;
    background-color: var(--surface-color);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--primary-color);
    background-color: var(--surface-hover);
    box-shadow: var(--shadow-lg);
}

.live-record-wrapper {
    margin-bottom: 2rem;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.record-button {
    background-color: var(--surface-solid);
    color: var(--danger-color);
    border: 2px solid var(--danger-color);
    padding: 0.9rem 2.25rem;
    font-size: 1.05rem;
    font-weight: 700;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: 0 4px 12px rgba(244, 63, 94, 0.1);
}

.record-button:hover {
    background-color: var(--danger-color);
    color: white;
    box-shadow: 0 8px 20px rgba(244, 63, 94, 0.25);
}

.record-button.recording {
    background-color: var(--danger-color);
    color: white;
    border-color: var(--danger-color);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(244, 63, 94, 0.7); }
    70% { box-shadow: 0 0 0 15px rgba(244, 63, 94, 0); }
    100% { box-shadow: 0 0 0 0 rgba(244, 63, 94, 0); }
}

.record-status {
    margin-top: 1.25rem;
    color: var(--text-muted);
    font-size: 0.95rem;
    transition: var(--transition);
}

.divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 2.25rem 0;
    color: var(--text-muted);
    font-weight: 700;
    font-size: 0.8rem;
    letter-spacing: 1.5px;
    width: 75%;
}

.divider::before, .divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--border-color);
}

.divider span {
    padding: 0 1.25rem;
}

.file-upload-wrapper {
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
}

.file-upload-wrapper h2 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
    color: var(--text-main);
    font-weight: 700;
}

.file-upload-wrapper p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.results-dashboard {
    background: var(--surface-solid);
    padding: 4rem 3rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    text-align: center;
}

.results-header {
    margin-bottom: 2.5rem;
    color: var(--primary-color);
    font-weight: 900;
    font-size: 2.25rem;
    letter-spacing: -0.8px;
}

.emotion-detected {
    margin-bottom: 3.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.emotion-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 700;
    letter-spacing: 0.8px;
    text-transform: uppercase;
}

.emotion-value {
    font-size: 4.5rem;
    font-weight: 900;
    color: var(--text-main);
    text-transform: capitalize;
    letter-spacing: -2px;
    line-height: 1.1;
    transition: var(--transition);
}

.confidence-container {
    text-align: left;
    margin-bottom: 3.5rem;
    background: var(--bg-color);
    padding: 1.75rem;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
}

.confidence-header {
    display: flex;
    justify-content: space-between;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-main);
}

#confidence-percentage {
    color: var(--primary-color);
    font-weight: 800;
}

.progress-bar-bg {
    width: 100%;
    height: 16px;
    background-color: var(--border-color);
    border-radius: 50px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 50px;
    transition: width 1.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.reset-button {
    background-color: var(--surface-solid);
    color: var(--text-main);
    border: 2px solid var(--border-color);
    padding: 1rem 2.5rem;
    font-size: 1.05rem;
    font-weight: 700;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.reset-button:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.hidden {
    display: none !important;
}

/* Details Section */
.details-container {
    max-width: 960px;
    margin: 0 auto;
}

.section-title {
    font-size: 2.75rem;
    margin-bottom: 1rem;
    text-align: center;
    font-weight: 900;
    letter-spacing: -1.2px;
}

.details-container .section-title {
    margin-bottom: 3rem;
}

.performance-cards {
    display: grid;
    grid-template-columns: 1fr;
    margin-bottom: 4rem;
}

.perf-card {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: 3rem 2rem;
    border-radius: var(--border-radius-lg);
    color: white;
    text-align: center;
    box-shadow: 0 20px 40px -10px rgba(99, 102, 241, 0.3);
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.perf-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 50px -8px rgba(99, 102, 241, 0.45);
}

.perf-card h4 {
    font-weight: 700;
    font-size: 1.15rem;
    opacity: 0.95;
    margin-bottom: 0.75rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.perf-score {
    font-weight: 900;
    font-size: 4rem;
    margin-bottom: 0.75rem;
    letter-spacing: -2px;
}

.perf-card p {
    font-size: 1.05rem;
    opacity: 0.85;
}

/* Architecture Flow */
.architecture-flow {
    background: var(--surface-color);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: 3.5rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.architecture-flow h3 {
    text-align: center;
    font-size: 1.8rem;
    margin-bottom: 4rem;
    font-weight: 800;
    color: var(--primary-color);
}

.flow-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.flow-step {
    text-align: center;
    position: relative;
    padding: 2.25rem 1.5rem 1.5rem 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    background: var(--bg-color);
    transition: var(--transition);
}

.flow-step:hover {
    transform: translateY(-6px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.step-number {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    font-weight: 800;
    position: absolute;
    top: 0;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 6px 15px rgba(99, 102, 241, 0.35);
    border: 4px solid var(--surface-solid);
}

.flow-step h4 {
    font-size: 1.15rem;
    color: var(--text-main);
    margin-bottom: 0.75rem;
    font-weight: 700;
}

.flow-step p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* Contact Section */
.contact-container {
    max-width: 840px;
    margin: 0 auto;
}

.contact-container .section-title {
    margin-bottom: 0.75rem;
}

.contact-subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 3.5rem;
}

.contact-info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.contact-card {
    background: var(--surface-color);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: 2.5rem;
    border-radius: var(--border-radius-md);
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-hover);
}

.contact-icon {
    font-size: 2.75rem;
    margin-bottom: 1.25rem;
}

.contact-card h4 {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

.contact-box {
    background: var(--bg-color);
    padding: 1.1rem;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
    margin-top: 1.25rem;
    word-break: break-all;
    transition: var(--transition);
}

.contact-card:hover .contact-box {
    border-color: var(--primary-color);
}

.contact-link {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.email-link {
    font-size: 1.15rem;
}

.contact-link:hover {
    color: var(--primary-hover);
}

.contact-form-wrapper {
    background: var(--surface-color);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: 4rem 3rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.contact-form-wrapper h3 {
    font-size: 1.75rem;
    margin-bottom: 2rem;
    text-align: center;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.input-group {
    margin-bottom: 1.75rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.6rem;
    font-weight: 600;
    color: var(--text-main);
    font-size: 0.9rem;
}

.input-group input, .input-group textarea {
    width: 100%;
    padding: 1.1rem 1.35rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 0.95rem;
    transition: var(--transition);
    background-color: var(--bg-color);
    color: var(--text-main);
}

.input-group input:focus, .input-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: var(--surface-solid);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
}

.submit-button {
    width: 100%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: white;
    border: none;
    padding: 1.25rem;
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition);
    margin-top: 1rem;
    box-shadow: 0 8px 20px -6px rgba(99, 102, 241, 0.35);
}

.submit-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 25px -4px rgba(99, 102, 241, 0.5);
}

.submit-button:active {
    transform: translateY(0);
}

/* Footer */
.footer {
    text-align: center;
    padding: 2.5rem;
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 600;
    border-top: 1px solid var(--border-color);
    background-color: var(--surface-color);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    margin-top: auto;
}

/* Audio Wave Visualizer */
.audio-wave {
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin: 2rem 0 1rem 0;
    transition: var(--transition);
}

.audio-wave .stroke {
    display: block;
    position: relative;
    background: var(--danger-color);
    height: 100%;
    width: 6px;
    border-radius: 50px;
    animation: wave-anim 1.2s infinite ease-in-out;
}

.audio-wave .stroke:nth-child(2) { animation-delay: 0.3s; }
.audio-wave .stroke:nth-child(3) { animation-delay: 0.6s; }
.audio-wave .stroke:nth-child(4) { animation-delay: 0.9s; }
.audio-wave .stroke:nth-child(5) { animation-delay: 0.12s; }

@keyframes wave-anim {
    0%, 100% { height: 8px; }
    50% { height: 40px; }
}

/* Responsive Grid and Spacing Tweak */
@media (max-width: 992px) {
    .hero-split {
        grid-template-columns: 1fr;
        gap: 2.5rem;
        text-align: center;
    }
    
    .hero-content-left {
        align-items: center;
    }
    
    .hero-title {
        text-align: center;
        font-size: 3.25rem;
    }
    
    .hero-subtitle {
        text-align: center;
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 1.25rem 4%;
        flex-direction: column;
        gap: 1.25rem;
    }
    
    .nav-menu {
        flex-direction: column;
        gap: 1.25rem;
        width: 100%;
    }
    
    .nav-links {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .nav-links a {
        padding: 0.4rem 0.75rem;
        font-size: 0.85rem;
    }
    
    .hero-title {
        font-size: 2.25rem;
        letter-spacing: -0.8px;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .container {
        padding: 2.5rem 4%;
    }
    
    .input-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .flow-steps {
        grid-template-columns: 1fr;
        gap: 3.5rem;
    }
    
    .flow-step {
        padding-top: 2.5rem;
    }
    
    .contact-form-wrapper {
        padding: 2.5rem 1.5rem;
    }
    
    .results-dashboard {
        padding: 2.5rem 1.5rem;
    }
}