/* ============================================
   WAPI SaaS Platform - Main Stylesheet
   Premium SaaS Design System
   ============================================ */

/* ===== CSS Variables / Design Tokens ===== */
:root {
    /* Primary Colors */
    --primary: #6c63ff;
    --primary-dark: #5a52d5;
    --primary-light: #8b83ff;
    --primary-bg: rgba(108, 99, 255, 0.08);

    /* Secondary Colors */
    --secondary: #3f3d56;
    --accent: #00d2ff;
    --accent-dark: #00b8e6;

    /* WhatsApp Green */
    --whatsapp: #25D366;
    --whatsapp-dark: #128C7E;
    --whatsapp-light: #DCF8C6;

    /* Status Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;

    /* Neutrals */
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    /* Light Mode Background */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-card: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Plus Jakarta Sans', 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Sizing */
    --header-height: 72px;
    --sidebar-width: 260px;
    --sidebar-collapsed: 72px;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 20px rgba(108, 99, 255, 0.3);

    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;
}

/* ===== Dark Mode ===== */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #334155;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.5);
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-primary);
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

a:hover {
    color: var(--primary-dark);
}

img {
    max-width: 100%;
    height: auto;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-primary);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.375rem; }
h5 { font-size: 1.125rem; }

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 3rem;
}

/* ===== Buttons ===== */
.btn {
    font-family: var(--font-primary);
    font-weight: 600;
    padding: 0.625rem 1.5rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9375rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    border-color: var(--primary);
    box-shadow: 0 4px 14px rgba(108, 99, 255, 0.4);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), #4840c4);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(108, 99, 255, 0.5);
    color: var(--white);
}

.btn-outline-primary {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary);
}

.btn-outline-primary:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
}

.btn-success {
    background: linear-gradient(135deg, var(--whatsapp), var(--whatsapp-dark));
    color: var(--white);
    border-color: var(--whatsapp);
    box-shadow: 0 4px 14px rgba(37, 211, 102, 0.4);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.5);
    color: var(--white);
}

.btn-lg {
    padding: 0.875rem 2rem;
    font-size: 1.0625rem;
    border-radius: var(--border-radius);
}

.btn-sm {
    padding: 0.375rem 0.875rem;
    font-size: 0.8125rem;
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-sm);
}

/* ===== Cards ===== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    overflow: hidden;
}

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

.card-glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

[data-theme="dark"] .card-glass {
    background: rgba(30, 41, 59, 0.7);
    border-color: rgba(255, 255, 255, 0.05);
}

/* ===== Navbar ===== */
.navbar {
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 0 2rem;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: var(--transition);
}

[data-theme="dark"] .navbar {
    background: rgba(15, 23, 42, 0.85);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar-brand {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-brand img {
    height: 36px;
}

.nav-link {
    font-weight: 500;
    color: var(--text-secondary) !important;
    padding: 0.5rem 1rem !important;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
    color: var(--primary) !important;
    background: var(--primary-bg);
}

/* ===== Hero Section ===== */
.hero-section {
    padding: 10rem 0 6rem;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(108, 99, 255, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-section::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0, 210, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 1.5rem;
}

.hero-title span {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 500px;
    line-height: 1.7;
}

.hero-image {
    position: relative;
    z-index: 2;
}

.hero-image img {
    max-width: 540px;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.1));
}

.hero-stats {
    display: flex;
    gap: 2.5rem;
    margin-top: 3rem;
}

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

.hero-stat-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--primary);
}

.hero-stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* ===== Features Section ===== */
.features-section {
    padding: 6rem 0;
    background: var(--bg-secondary);
}

.feature-card {
    text-align: center;
    padding: 2rem 1.5rem;
    border-radius: var(--border-radius-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    height: 100%;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--border-radius);
    background: var(--primary-bg);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
    font-size: 1.5rem;
    color: var(--primary);
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    background: var(--primary);
    color: var(--white);
    transform: scale(1.1);
}

.feature-card h5 {
    margin-bottom: 0.75rem;
    font-weight: 700;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
}

/* ===== WhatsApp Demo Section ===== */
.demo-section {
    padding: 6rem 0;
    background: var(--bg-primary);
}

.whatsapp-phone {
    max-width: 360px;
    margin: 0 auto;
    background: var(--gray-100);
    border-radius: 30px;
    padding: 12px;
    box-shadow: var(--shadow-xl);
}

[data-theme="dark"] .whatsapp-phone {
    background: var(--gray-800);
}

.whatsapp-screen {
    background: #e5ddd5;
    border-radius: 22px;
    overflow: hidden;
}

.wa-header {
    background: var(--whatsapp-dark);
    color: white;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.wa-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--whatsapp);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.875rem;
}

.wa-name {
    font-weight: 600;
    font-size: 0.9375rem;
}

.wa-status {
    font-size: 0.75rem;
    opacity: 0.8;
}

.wa-messages {
    padding: 16px;
    min-height: 320px;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 300 300"><defs><pattern id="p" patternUnits="userSpaceOnUse" width="20" height="20"><circle cx="10" cy="10" r="0.5" fill="%23c8c0b8" opacity="0.3"/></pattern></defs><rect fill="url(%23p)" width="300" height="300"/></svg>');
}

.wa-bubble {
    max-width: 80%;
    padding: 8px 12px;
    border-radius: 8px;
    margin-bottom: 8px;
    font-size: 0.875rem;
    line-height: 1.5;
    position: relative;
    animation: fadeInMsg 0.4s ease;
}

.wa-bubble.sent {
    background: var(--whatsapp-light);
    margin-left: auto;
    border-bottom-right-radius: 2px;
}

.wa-bubble.received {
    background: white;
    margin-right: auto;
    border-bottom-left-radius: 2px;
}

.wa-time {
    font-size: 0.6875rem;
    color: #999;
    text-align: right;
    margin-top: 4px;
}

.wa-input-bar {
    background: #f0f0f0;
    padding: 8px 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.wa-input {
    flex: 1;
    background: white;
    border: none;
    border-radius: 20px;
    padding: 8px 16px;
    font-size: 0.875rem;
    outline: none;
}

.wa-send-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--whatsapp);
    color: white;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-fast);
}

.wa-send-btn:hover {
    background: var(--whatsapp-dark);
}

@keyframes fadeInMsg {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== Pricing Section ===== */
.pricing-section {
    padding: 6rem 0;
    background: var(--bg-secondary);
}

.pricing-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.pricing-toggle span {
    font-weight: 600;
    color: var(--text-secondary);
}

.pricing-toggle span.active {
    color: var(--primary);
}

.toggle-switch {
    position: relative;
    width: 56px;
    height: 28px;
    background: var(--gray-300);
    border-radius: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.toggle-switch.active {
    background: var(--primary);
}

.toggle-switch::after {
    content: '';
    position: absolute;
    width: 22px;
    height: 22px;
    background: white;
    border-radius: 50%;
    top: 3px;
    left: 3px;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.toggle-switch.active::after {
    transform: translateX(28px);
}

.pricing-save {
    background: var(--success);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.pricing-card {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
    position: relative;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.pricing-card.popular {
    border-color: var(--primary);
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

.pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.pricing-card.popular:hover {
    transform: scale(1.05) translateY(-8px);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pricing-plan-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.pricing-amount {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary);
    margin: 1rem 0;
}

.pricing-amount .currency {
    font-size: 1.5rem;
    vertical-align: top;
    line-height: 2;
}

.pricing-amount .period {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 400;
}

.pricing-features {
    list-style: none;
    padding: 0;
    margin: 1.5rem 0;
    text-align: left;
    flex: 1;
}

.pricing-features li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.pricing-features li i {
    font-size: 1rem;
}

.pricing-features li i.bi-check-circle-fill {
    color: var(--success);
}

.pricing-features li i.bi-x-circle-fill {
    color: var(--gray-400);
}

.pricing-features li.disabled {
    color: var(--text-muted);
    text-decoration: line-through;
}

/* ===== Testimonials Section ===== */
.testimonials-section {
    padding: 6rem 0;
    background: var(--bg-primary);
}

.testimonial-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    transition: var(--transition);
    height: 100%;
}

.testimonial-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.testimonial-stars {
    color: #fbbf24;
    margin-bottom: 1rem;
    font-size: 1.125rem;
}

.testimonial-text {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
    font-style: italic;
}

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

.testimonial-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.125rem;
}

.testimonial-name {
    font-weight: 700;
    font-size: 0.9375rem;
}

.testimonial-role {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* ===== FAQ Section ===== */
.faq-section {
    padding: 6rem 0;
    background: var(--bg-secondary);
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: 0.75rem;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--primary);
}

.faq-question {
    padding: 1.25rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition-fast);
    gap: 1rem;
}

.faq-question:hover {
    color: var(--primary);
}

.faq-question i {
    transition: var(--transition);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
    color: var(--primary);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-answer-inner {
    padding: 0 1.5rem 1.25rem;
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.9375rem;
}

/* ===== Footer ===== */
.footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: 4rem 0 2rem;
}

.footer h5 {
    color: var(--white);
    font-size: 1rem;
    margin-bottom: 1.25rem;
}

.footer-links {
    list-style: none;
    padding: 0;
}

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

.footer-links a {
    color: var(--gray-400);
    font-size: 0.9375rem;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-light);
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid var(--gray-800);
    padding-top: 1.5rem;
    margin-top: 3rem;
    text-align: center;
    color: var(--gray-500);
    font-size: 0.875rem;
}

.footer-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gray-800);
    color: var(--gray-400);
    margin: 0 4px;
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-3px);
}

/* ===== Auth Pages ===== */
.auth-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.auth-card {
    width: 100%;
    max-width: 440px;
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    padding: 2.5rem;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
}

.auth-logo {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-logo .brand {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.auth-title {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.5rem;
}

.auth-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 0.9375rem;
}

/* ===== Form Styles ===== */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-primary);
    margin-bottom: 0.375rem;
    display: block;
}

.form-control {
    background: var(--bg-secondary);
    border: 1.5px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 0.625rem 1rem;
    font-size: 0.9375rem;
    color: var(--text-primary);
    transition: var(--transition-fast);
    width: 100%;
    font-family: var(--font-primary);
}

.form-control:focus {
    border-color: var(--primary);
    background: var(--bg-card);
    box-shadow: 0 0 0 3px var(--primary-bg);
    outline: none;
}

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

.input-group {
    position: relative;
}

.input-group .input-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.125rem;
}

.input-group .form-control {
    padding-left: 2.75rem;
}

.input-group .toggle-password {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    cursor: pointer;
    border: none;
    background: none;
    font-size: 1.125rem;
}

/* ===== Alerts ===== */
.alert {
    padding: 0.875rem 1.25rem;
    border-radius: var(--border-radius-sm);
    margin-bottom: 1rem;
    font-size: 0.9375rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border: 1px solid transparent;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border-color: rgba(16, 185, 129, 0.2);
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border-color: rgba(239, 68, 68, 0.2);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
    border-color: rgba(245, 158, 11, 0.2);
}

.alert-info {
    background: rgba(59, 130, 246, 0.1);
    color: var(--info);
    border-color: rgba(59, 130, 246, 0.2);
}

/* ===== WhatsApp Chat Widget ===== */
.chat-widget {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 9999;
}

.chat-widget-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--whatsapp);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
    transition: var(--transition);
    animation: pulse-wa 2s infinite;
}

.chat-widget-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 25px rgba(37, 211, 102, 0.5);
}

@keyframes pulse-wa {
    0% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.5); }
    70% { box-shadow: 0 0 0 15px rgba(37, 211, 102, 0); }
    100% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}

/* ===== Loading Spinner ===== */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
}

[data-theme="dark"] .loading-overlay {
    background: rgba(15, 23, 42, 0.8);
}

/* ===== Theme Toggle ===== */
.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1.125rem;
}

.theme-toggle:hover {
    background: var(--primary-bg);
    color: var(--primary);
}

/* ===== Badge ===== */
.badge-custom {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.3px;
}

/* ===== Responsive ===== */
@media (max-width: 991.98px) {
    .hero-title { font-size: 2.5rem; }
    .section-title { font-size: 2rem; }
    .hero-image img { max-width: 100%; }
    .hero-stats { gap: 1.5rem; }
    .pricing-card.popular { transform: none; }
    .pricing-card.popular:hover { transform: translateY(-8px); }
}

@media (max-width: 767.98px) {
    .hero-section { padding: 7rem 0 4rem; text-align: center; }
    .hero-title { font-size: 2rem; }
    .hero-subtitle { font-size: 1.0625rem; margin: 0 auto 2rem; }
    .hero-stats { justify-content: center; flex-wrap: wrap; }
    .hero-image { margin-top: 2rem; }
    .section-title { font-size: 1.75rem; }
    .pricing-card { padding: 1.5rem; }
    .auth-card { padding: 1.5rem; }
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    .nav-link { padding: 0.75rem 1rem !important; }
    .navbar { padding: 0 1rem; }
}

@media (max-width: 575.98px) {
    .hero-title { font-size: 1.75rem; }
    .hero-stat-value { font-size: 1.5rem; }
    .pricing-amount { font-size: 2.25rem; }
}

/* ===== Utility Classes ===== */
.text-gradient {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

.fade-in {
    animation: fadeIn 0.6s ease;
}

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

.hover-lift {
    transition: var(--transition);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}