/* ===================================
   LETSINVOICE - PREMIUM PROFESSIONAL THEME
   Refined, elegant design for business software
   =================================== */

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Neutral Foundation */
    --bg-primary: #fafafa;
    --bg-secondary: #f4f4f5;
    --bg-tertiary: #e4e4e7;

    /* Surface Colors */
    --surface: #ffffff;
    --surface-elevated: #ffffff;
    --surface-overlay: rgba(255, 255, 255, 0.98);

    /* Accent - Deep Navy / Slate */
    --accent-primary: #0f172a;
    --accent-secondary: #1e293b;
    --accent-gradient: linear-gradient(135deg, #0f172a 0%, #334155 100%);

    /* Brand Accent - Subtle indigo for CTAs */
    --brand: #4f46e5;
    --brand-light: #6366f1;
    --brand-dark: #4338ca;
    --brand-gradient: linear-gradient(135deg, #4f46e5 0%, #6366f1 100%);
    --brand-subtle: rgba(79, 70, 229, 0.06);

    /* Status Colors - Muted, professional */
    --success-color: #059669;
    --danger-color: #dc2626;
    --warning-color: #d97706;
    --info-color: #2563eb;

    /* Text Colors */
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --text-color: #0f172a;

    /* Layout Colors */
    --light-bg: #fafafa;
    --border-color: #e2e8f0;
    --border-subtle: #f1f5f9;

    /* Alias for compatibility */
    --primary-color: #4f46e5;
    --primary-dark: #4338ca;

    /* Refined Spacing & Radius */
    --border-radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --transition: all 0.2s ease;

    /* Shadows - Layered, subtle */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.06), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.06), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

a {
    color: inherit;
    text-decoration: none;
}

/* ===================================
   HEADER & NAVIGATION
   =================================== */

.header {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.875rem 0;
}

.logo a {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
    font-size: 0.9rem;
}

.nav-menu a:hover {
    color: var(--text-primary);
}

.nav-menu .btn-primary {
    border-radius: 100px;
    padding: 0.55rem 1.35rem;
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: -0.01em;
    background: var(--text-primary);
    color: #fff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

.nav-menu .btn-primary:hover {
    background: var(--accent-secondary);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.18);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 20px;
    height: 1.5px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: var(--transition);
    border-radius: 1px;
}

/* ===================================
   BUTTONS
   =================================== */

.btn-primary, .btn-secondary {
    padding: 0.625rem 1.5rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-size: 0.875rem;
    cursor: pointer;
    border: none;
    letter-spacing: -0.01em;
}

.btn-primary {
    background: var(--brand);
    color: white;
}

.btn-primary:hover {
    background: var(--brand-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--text-muted);
}

.btn-large {
    padding: 0.8rem 2rem;
    font-size: 0.95rem;
}

.btn-success {
    background: var(--success-color);
    color: white;
}

.btn-brand {
    background: var(--brand);
    color: white;
}

.btn-brand:hover {
    background: var(--brand-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
}

/* ===================================
   HERO SECTION
   =================================== */

.hero {
    padding: 7rem 0 5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(79, 70, 229, 0.04) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 720px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    background: var(--brand-subtle);
    border: 1px solid rgba(79, 70, 229, 0.12);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--brand);
    margin-bottom: 2rem;
    letter-spacing: -0.01em;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.25rem;
    font-weight: 700;
    line-height: 1.1;
    color: var(--text-primary);
    letter-spacing: -0.035em;
}

.hero p {
    font-size: 1.15rem;
    margin-bottom: 2.5rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.hero-note {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ===================================
   TRUSTED BY / SOCIAL PROOF
   =================================== */

.trusted-bar {
    padding: 3rem 0;
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    text-align: center;
}

.trusted-bar p {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 1.5rem;
}

.trusted-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    flex-wrap: wrap;
    opacity: 0.4;
}

/* ===================================
   FEATURES SECTION
   =================================== */

.features {
    padding: 6rem 0;
    position: relative;
    z-index: 1;
}

.section-label {
    display: inline-block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--brand);
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.section-title {
    text-align: center;
    font-size: 2.25rem;
    margin-bottom: 0.75rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.03em;
}

.section-subtitle {
    text-align: center;
    font-size: 1.05rem;
    margin-bottom: 3.5rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--border-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.feature-card {
    background: var(--surface);
    padding: 2.5rem;
    transition: var(--transition);
}

.feature-card:hover {
    background: var(--bg-secondary);
}

.feature-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--brand-subtle);
    border-radius: var(--radius-sm);
    margin-bottom: 1.25rem;
    color: var(--brand);
}

.feature-icon svg {
    width: 20px;
    height: 20px;
    stroke: var(--brand);
    stroke-width: 1.5;
    fill: none;
}

.feature-card h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: -0.01em;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.9rem;
}

/* ===================================
   PRICING SECTION
   =================================== */

.pricing {
    padding: 6rem 0;
    position: relative;
    z-index: 1;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    margin-top: 3rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.pricing-card {
    background: var(--surface);
    padding: 2.5rem;
    text-align: left;
    transition: var(--transition);
    position: relative;
    border-right: 1px solid var(--border-color);
}

.pricing-card:last-child {
    border-right: none;
}

.pricing-card:hover {
    background: var(--bg-secondary);
}

.pricing-card.popular {
    background: var(--text-primary);
    color: white;
    border-color: var(--text-primary);
}

.pricing-card.popular .plan-name {
    color: rgba(255, 255, 255, 0.7);
}

.pricing-card.popular .plan-price .price {
    color: white;
}

.pricing-card.popular .plan-price .currency,
.pricing-card.popular .plan-price .period {
    color: rgba(255, 255, 255, 0.6);
}

.pricing-card.popular .plan-features .included {
    color: rgba(255, 255, 255, 0.85);
}

.pricing-card.popular .plan-features .excluded {
    color: rgba(255, 255, 255, 0.35);
}

.pricing-card.popular .plan-note {
    color: rgba(255, 255, 255, 0.5);
}

.pricing-card.popular .btn-primary {
    background: white;
    color: var(--text-primary);
}

.pricing-card.popular .btn-primary:hover {
    background: var(--bg-secondary);
}

.popular-badge {
    background: var(--brand);
    color: white;
    padding: 0.3rem 0.85rem;
    border-radius: 100px;
    font-size: 0.7rem;
    font-weight: 600;
    display: inline-block;
    margin-bottom: 1.5rem;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.plan-name {
    font-size: 0.85rem;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.plan-price {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.pricing-card.popular .plan-price {
    border-bottom-color: rgba(255, 255, 255, 0.15);
}

.plan-price .currency {
    font-size: 1.25rem;
    vertical-align: top;
    color: var(--text-secondary);
    font-weight: 500;
}

.plan-price .price {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.04em;
    line-height: 1;
}

.plan-price .period {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.plan-features {
    list-style: none;
    margin-bottom: 2rem;
    text-align: left;
}

.plan-features li {
    padding: 0.5rem 0;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.plan-features .included {
    color: var(--text-secondary);
}

.plan-features .excluded {
    color: var(--text-muted);
    opacity: 0.5;
}

.plan-note {
    margin-top: 1.25rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ===================================
   ABOUT / WHY SECTION
   =================================== */

.about {
    padding: 6rem 0;
    position: relative;
    z-index: 1;
}

.about-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.about-item {
    text-align: left;
    padding: 1.5rem;
}

.about-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--brand-subtle);
    border-radius: var(--radius-sm);
    margin-bottom: 1.25rem;
}

.about-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--brand);
    stroke-width: 1.5;
    fill: none;
}

.about-item h3 {
    font-size: 1.05rem;
    margin-bottom: 0.6rem;
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: -0.01em;
}

.about-item p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.9rem;
}

/* ===================================
   CTA SECTION
   =================================== */

.cta {
    padding: 5rem 0;
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta-container {
    background: var(--text-primary);
    border-radius: var(--radius-xl);
    padding: 4rem 3rem;
    max-width: 800px;
    margin: 0 auto;
}

.cta h2 {
    font-size: 2.25rem;
    margin-bottom: 1rem;
    font-weight: 700;
    color: white;
    letter-spacing: -0.03em;
}

.cta p {
    font-size: 1.05rem;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.6);
}

.cta .btn-primary {
    background: white;
    color: var(--text-primary);
    font-weight: 600;
}

.cta .btn-primary:hover {
    background: var(--bg-secondary);
    transform: translateY(-1px);
}

/* ===================================
   FOOTER
   =================================== */

.footer {
    border-top: 1px solid var(--border-color);
    padding: 3.5rem 0 1.5rem;
    position: relative;
    z-index: 1;
}

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

.footer-section h4 {
    margin-bottom: 1rem;
    font-size: 0.8rem;
    color: var(--text-primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.875rem;
}

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

.footer-section p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.7;
}

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ===================================
   FORM STYLES
   =================================== */

.form-container {
    max-width: 440px;
    margin: 4rem auto;
    padding: 2.5rem;
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.form-container h2 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-container .form-subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 2rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.85rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.7rem 0.875rem;
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    transition: var(--transition);
    color: var(--text-primary);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--brand);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

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

.form-error {
    color: var(--danger-color);
    font-size: 0.8rem;
    margin-top: 0.35rem;
}

.alert {
    padding: 0.875rem 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1.25rem;
    font-size: 0.875rem;
    border: 1px solid;
}

.alert-success {
    background: #f0fdf4;
    color: var(--success-color);
    border-color: #bbf7d0;
}

.alert-error {
    background: #fef2f2;
    color: var(--danger-color);
    border-color: #fecaca;
}

.alert-info {
    background: #eff6ff;
    color: var(--info-color);
    border-color: #bfdbfe;
}

/* ===================================
   FAQ STYLES
   =================================== */

.faq-section {
    margin-top: 4rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.faq-section h2 {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.faq-item {
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--border-color);
}

.faq-item:first-child {
    border-top: 1px solid var(--border-color);
}

.faq-item h3 {
    margin-bottom: 0.4rem;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
}

.faq-item p {
    color: var(--text-secondary);
    margin: 0;
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ===================================
   DASHBOARD STYLES
   =================================== */

.dashboard {
    min-height: 100vh;
}

.dashboard-header {
    background: var(--surface);
    padding: 0.875rem 0;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.dashboard-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.dashboard-nav .logo a {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
    text-decoration: none;
    transition: var(--transition);
}

.dashboard-nav .logo a:hover {
    opacity: 0.8;
}

.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 260px;
    height: 100vh;
    background: var(--surface);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem 0;
    padding-top: 70px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    z-index: 50;
}

.sidebar-menu {
    list-style: none;
}

.sidebar-menu a {
    display: flex;
    align-items: center;
    padding: 0.7rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.875rem;
    font-weight: 500;
}

.sidebar-menu a:hover,
.sidebar-menu a.active {
    color: var(--text-primary);
    background: var(--bg-secondary);
}

.sidebar-menu a.active {
    font-weight: 600;
    border-right: 2px solid var(--brand);
}

.dashboard-content {
    margin-left: 260px;
    padding: 2rem;
    min-height: 100vh;
    background: var(--bg-primary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--surface);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
}

.stat-card h3 {
    color: var(--text-muted);
    font-size: 0.75rem;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.05em;
}

.stat-card .stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.03em;
}

.stat-card small {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ===================================
   TABLE STYLES
   =================================== */

.table-container {
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 0;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

table th {
    text-align: left;
    padding: 0.75rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: var(--bg-secondary);
}

table td {
    padding: 0.875rem 1.25rem;
    border-bottom: 1px solid var(--border-subtle);
    color: var(--text-primary);
    font-size: 0.875rem;
}

table tr:last-child td {
    border-bottom: none;
}

table tr:hover {
    background: var(--bg-secondary);
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    border-radius: 100px;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.badge-success {
    background: #f0fdf4;
    color: var(--success-color);
}

.badge-warning {
    background: #fffbeb;
    color: var(--warning-color);
}

.badge-danger {
    background: #fef2f2;
    color: var(--danger-color);
}

.badge-info {
    background: #eff6ff;
    color: var(--info-color);
}

.badge-secondary {
    background: var(--bg-secondary);
    color: var(--text-secondary);
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */

@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

    .pricing-card {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .pricing-card:last-child {
        border-bottom: none;
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 56px;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.85);
        backdrop-filter: blur(20px) saturate(180%);
        -webkit-backdrop-filter: blur(20px) saturate(180%);
        width: 100%;
        text-align: center;
        transition: var(--transition);
        padding: 1.5rem 0;
        border-bottom: 1px solid rgba(0, 0, 0, 0.06);
        box-shadow: var(--shadow-lg);
        gap: 0.5rem;
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hero {
        padding: 4rem 0 3rem;
    }

    .hero h1 {
        font-size: 2.25rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-buttons .btn-primary,
    .hero-buttons .btn-secondary {
        width: 100%;
        max-width: 280px;
    }

    .section-title {
        font-size: 1.75rem;
    }

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

    .about-content {
        grid-template-columns: 1fr;
    }

    .cta-container {
        padding: 2.5rem 1.5rem;
    }

    .cta h2 {
        font-size: 1.75rem;
    }

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

    .dashboard-content {
        margin-left: 0;
        padding: 1.25rem;
    }

    .sidebar {
        display: none;
    }

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

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.875rem;
    }

    .container {
        padding: 0 16px;
    }
}

/* ===================================
   UTILITY CLASSES
   =================================== */

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

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.section-box {
    background: var(--surface);
    border: 1px solid var(--border-color);
    padding: 1.75rem;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
}

.section-box h2 {
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.section-box p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.9rem;
}

/* Glass card fallback for existing references */
.glass-card {
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.glass-card:hover {
    box-shadow: var(--shadow-md);
}