/* ============================
   CSS Variables & Base
   ============================ */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #1a1a25;
    --bg-tertiary: #22222e;
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --border-primary: rgba(255, 255, 255, 0.08);
    --border-accent: rgba(139, 92, 246, 0.3);
    --accent-primary: #8b5cf6;
    --accent-secondary: #6366f1;
    --accent-tertiary: #a855f7;
    --gradient-primary: linear-gradient(135deg, #8b5cf6, #6366f1, #a855f7);
    --gradient-glow: linear-gradient(135deg, rgba(139, 92, 246, 0.15), rgba(99, 102, 241, 0.15));
    --shadow-lg: 0 25px 50px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(139, 92, 246, 0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    --font-display: 'Poppins', sans-serif;
    --font-secondary: 'Inter', sans-serif;
    --transition-fast: all 0.2s ease;
    --transition-normal: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-secondary);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

img {
    max-width: 100%;
}

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

/* ============================
   Navbar
   ============================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-primary);
    transition: var(--transition-fast);
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.95);
    padding: 12px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-icon {
    width: 36px;
    height: 36px;
    color: var(--accent-primary);
}

.logo-dot {
    color: var(--accent-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition-fast);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-fast);
}

.nav-links a:hover::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-btn svg {
    width: 28px;
    height: 28px;
}

/* ============================
   Hero Section
   ============================ */
.hero {
    position: relative;
    padding: 180px 0 100px;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--gradient-glow);
    border: 1px solid var(--border-accent);
    padding: 8px 20px;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--accent-primary);
    margin-bottom: 32px;
    animation: fadeInUp 0.6s ease;
}

.hero-badge svg {
    color: var(--accent-tertiary);
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 24px;
    animation: fadeInUp 0.6s ease 0.1s backwards;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 48px;
    line-height: 1.7;
    animation: fadeInUp 0.6s ease 0.2s backwards;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 64px;
    animation: fadeInUp 0.6s ease 0.3s backwards;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Hero Background */
.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    pointer-events: none;
}

.glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
}

.glow-1 {
    width: 600px;
    height: 600px;
    background: var(--accent-primary);
    top: -200px;
    left: -200px;
    opacity: 0.15;
}

.glow-2 {
    width: 500px;
    height: 500px;
    background: var(--accent-secondary);
    top: -100px;
    right: -150px;
    opacity: 0.12;
}

.glow-3 {
    width: 400px;
    height: 400px;
    background: var(--accent-tertiary);
    bottom: -100px;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0.1;
}

/* ============================
   Warning Banner
   ============================ */
.warning-banner {
    padding: 0 0 60px;
}

.warning-card {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.1), rgba(245, 158, 11, 0.05));
    border: 1px solid rgba(251, 191, 36, 0.2);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.warning-icon {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    background: rgba(251, 191, 36, 0.15);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.warning-icon svg {
    color: #fbbf24;
}

.warning-text h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: #fbbf24;
}

.warning-text p {
    font-size: 0.925rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.warning-text strong {
    color: var(--text-primary);
}

/* ============================
   Main Form Section
   ============================ */
.main-card-section {
    padding: 0 0 100px;
}

.main-card {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    padding: 48px;
    max-width: 560px;
    margin: 0 auto;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.main-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
}

.card-header {
    text-align: center;
    margin-bottom: 32px;
}

.card-icon {
    width: 72px;
    height: 72px;
    background: var(--gradient-glow);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.card-icon svg {
    width: 36px;
    height: 36px;
    color: var(--accent-primary);
}

.card-header h2 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.card-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Form Styles */
.prank-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group label svg {
    color: var(--accent-primary);
}

.phone-input-wrapper {
    display: flex;
    gap: 12px;
}

.country-code {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    color: var(--text-primary);
    font-family: var(--font-secondary);
    font-size: 1rem;
    cursor: pointer;
    min-width: 110px;
    transition: var(--transition-fast);
}

.country-code:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
}

input[type="tel"],
input[type="number"] {
    flex: 1;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    color: var(--text-primary);
    font-family: var(--font-secondary);
    font-size: 1rem;
    transition: var(--transition-fast);
}

input[type="tel"]::placeholder,
input[type="number"]::placeholder {
    color: var(--text-muted);
}

input[type="tel"]:focus,
input[type="number"]:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
}

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

/* Checkbox */
.checkbox-group {
    margin-top: -4px;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    min-width: 20px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
    position: relative;
    transition: var(--transition-fast);
    margin-top: 2px;
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 1px;
    width: 6px;
    height: 11px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-label a {
    color: var(--accent-primary);
}

.checkbox-label a:hover {
    text-decoration: underline;
}

/* Button */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 28px;
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-secondary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(139, 92, 246, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-full {
    width: 100%;
    padding: 16px 24px;
    font-size: 1.05rem;
}

/* Card Footer */
.card-footer {
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border-primary);
}

.info-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.info-badge svg {
    color: var(--accent-primary);
}

/* ============================
   How to Use Section
   ============================ */
.how-to-use {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-badge {
    display: inline-block;
    background: var(--gradient-glow);
    border: 1px solid var(--border-accent);
    padding: 6px 16px;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-header h2 {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 12px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.step-card {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    text-align: center;
    position: relative;
    transition: var(--transition-normal);
}

.step-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-accent);
    box-shadow: var(--shadow-glow);
}

.step-number {
    position: absolute;
    top: 20px;
    right: 24px;
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-primary);
    opacity: 0.5;
}

.step-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-glow);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.step-icon svg {
    width: 36px;
    height: 36px;
    color: var(--accent-primary);
}

.step-card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.step-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ============================
   FAQ Section
   ============================ */
.faq {
    padding: 100px 0;
}

.faq-grid {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition-fast);
}

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

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 24px;
    background: none;
    border: none;
    color: var(--text-primary);
    font-family: var(--font-secondary);
    font-size: 1rem;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    transition: var(--transition-fast);
}

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

.faq-question svg {
    width: 20px;
    height: 20px;
    color: var(--text-muted);
    transition: var(--transition-fast);
    flex-shrink: 0;
}

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

.faq-item.active .faq-question {
    color: var(--accent-primary);
}

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

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 0 24px 20px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ============================
   Footer
   ============================ */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-primary);
    padding: 80px 0 32px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 80px;
    margin-bottom: 48px;
}

.footer-brand .logo {
    margin-bottom: 20px;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 24px;
    line-height: 1.7;
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-links a {
    width: 42px;
    height: 42px;
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.social-links a:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.social-links svg {
    width: 20px;
    height: 20px;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.social-links a:hover svg {
    color: white;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-column h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.footer-column a {
    display: block;
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 8px 0;
    transition: var(--transition-fast);
}

.footer-column a:hover {
    color: var(--accent-primary);
    transform: translateX(4px);
}

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid var(--border-primary);
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ============================
   Animations
   ============================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

.spinner {
    animation: spin 1s linear infinite;
}

/* Notification */
.notification {
    position: fixed;
    top: 100px;
    right: 24px;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px 20px;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
    max-width: 400px;
}

.notification-success {
    border-color: rgba(34, 197, 94, 0.3);
}

.notification-success svg {
    color: #22c55e;
}

.notification-error {
    border-color: rgba(239, 68, 68, 0.3);
}

.notification-error svg {
    color: #ef4444;
}

.notification-info svg {
    color: var(--accent-primary);
}

.notification-content {
    display: flex;
    align-items: center;
    gap: 12px;
}

.notification-content span {
    font-size: 0.95rem;
    color: var(--text-primary);
}

.notification-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.notification-close:hover {
    color: var(--text-primary);
}

/* ============================
   Responsive Design
   ============================ */
@media (max-width: 1024px) {
    .steps-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }

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

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero {
        padding: 140px 0 60px;
    }

    .hero-stats {
        gap: 32px;
    }

    .stat-number {
        font-size: 2rem;
    }

    .main-card {
        padding: 32px 24px;
    }

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

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

    .phone-input-wrapper {
        flex-direction: column;
    }

    .country-code {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }

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

    .warning-card {
        flex-direction: column;
    }

    .warning-icon {
        width: 48px;
        height: 48px;
    }
}

/* ============================
   Scrollbar
   ============================ */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

/* ============================
   Selection
   ============================ */
::selection {
    background: var(--accent-primary);
    color: white;
}