/* =====================================================
   DESIGN SYSTEM & VARIABLES
   ===================================================== */
:root {
    --primary-50: #f5f3ff;
    --primary-100: #ede9fe;
    --primary-200: #ddd6fe;
    --primary-300: #c4b5fd;
    --primary-400: #a78bfa;
    --primary-500: #8b5cf6;
    --primary-600: #7c3aed;
    --primary-700: #6d28d9;
    --primary-800: #5b21b6;
    --primary-900: #4c1d95;

    --secondary-500: #f97316;

    --bg-primary: #030014;
    --bg-secondary: #0a0a1f;
    --bg-tertiary: #111127;
    --surface-primary: rgba(15, 12, 41, 0.8);
    --surface-secondary: rgba(25, 20, 55, 0.6);
    --text-primary: #ffffff;
    --text-secondary: #e2e8f0;
    --text-tertiary: #94a3b8;
    --border-primary: rgba(139, 92, 246, 0.3);
    --border-secondary: rgba(255, 255, 255, 0.1);

    --gradient-primary: linear-gradient(135deg, var(--primary-500), var(--secondary-500));

    --font-primary: 'Cairo', sans-serif;
    --font-secondary: 'Outfit', sans-serif;

    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-32: 8rem;

    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-3xl: 2rem;
    --radius-full: 9999px;

    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --z-modal: 40;
    --z-fixed: 30;
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #f1f5f9;
    --bg-tertiary: #e2e8f0;
    --surface-primary: rgba(255, 255, 255, 0.9);
    --surface-secondary: rgba(255, 255, 255, 0.8);
    --text-primary: #0f172a;
    --text-secondary: #1e293b;
    --text-tertiary: #334155;
    --border-secondary: rgba(0, 0, 0, 0.1);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    transition: background-color var(--transition-base), color var(--transition-base);
}

::-webkit-scrollbar {
    width: 12px;
}
::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}
::-webkit-scrollbar-thumb {
    background: var(--primary-600);
    border-radius: var(--radius-full);
    border: 3px solid var(--bg-secondary);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary-500);
}

::selection {
    background: var(--primary-500);
    color: white;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-secondary);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-4);
}

p {
    margin-bottom: var(--space-4);
    color: var(--text-secondary);
}

a {
    color: var(--primary-500);
    text-decoration: none;
    transition: color var(--transition-base);
}
a:hover {
    color: var(--primary-600);
}

/* Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border: none;
    border-radius: var(--radius-lg);
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}
.btn-primary:hover {
    box-shadow: 0 8px 25px rgba(139, 92, 246, 0.5);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-500);
    color: var(--primary-500);
}
.btn-outline:hover {
    background: var(--primary-500);
    color: white;
}

.btn-ghost {
    background: transparent;
    color: var(--text-primary);
}
.btn-ghost:hover {
    background: var(--surface-secondary);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: 1.125rem;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--surface-primary);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-secondary);
    z-index: var(--z-fixed);
    padding: var(--space-4) 0;
}

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

.logo {
    font-family: var(--font-secondary);
    font-size: 1.5rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    display: flex;
    gap: var(--space-6);
}
.nav-link {
    color: var(--text-primary);
    font-weight: 500;
    position: relative;
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}
.nav-link:hover::after {
    transform: scaleX(1);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-32) var(--space-4);
    text-align: center;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 900;
    margin-bottom: var(--space-6);
}
.hero-title span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: clamp(1rem, 3vw, 1.25rem);
    color: var(--text-tertiary);
    margin-bottom: var(--space-8);
}

.hero-buttons {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
}

/* Features Section */
.features {
    padding: var(--space-32) var(--space-4);
    background: var(--bg-secondary);
}

.section-title {
    text-align: center;
    margin-bottom: var(--space-16);
}
.section-title h2 {
    font-size: clamp(2rem, 5vw, 3rem);
    margin-bottom: var(--space-4);
}
.section-title p {
    font-size: 1.125rem;
    color: var(--text-tertiary);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
}

.feature-card {
    background: var(--surface-primary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    text-align: center;
    transition: all var(--transition-base);
}
.feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-500);
    box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-6);
    background: var(--gradient-primary);
    border-radius: var(--radius-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
}

.feature-title {
    font-size: 1.5rem;
    margin-bottom: var(--space-4);
}

.feature-description {
    color: var(--text-tertiary);
}

/* How It Works */
.how-it-works {
    padding: var(--space-32) var(--space-4);
}

.steps {
    display: flex;
    justify-content: center;
    gap: var(--space-8);
    margin-top: var(--space-16);
}

.step {
    flex: 1;
    max-width: 300px;
    text-align: center;
    position: relative;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 900;
    color: white;
    margin: 0 auto var(--space-6);
}

.step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 30px;
    left: -50%;
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
    opacity: 0.3;
}

.step-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-4);
}

.step-description {
    color: var(--text-tertiary);
}

/* Footer */
.footer {
    background: var(--bg-tertiary);
    padding: var(--space-16) var(--space-4);
    border-top: 1px solid var(--border-secondary);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-8);
    margin-bottom: var(--space-16);
}

.footer-logo {
    font-family: var(--font-secondary);
    font-size: 2rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: var(--space-4);
    display: inline-block;
}

.footer-description {
    color: var(--text-tertiary);
    margin-bottom: var(--space-6);
}

.footer-title {
    font-size: 1.125rem;
    margin-bottom: var(--space-4);
}

.footer-links {
    list-style: none;
    padding: 0;
}
.footer-links li {
    margin-bottom: var(--space-2);
}
.footer-links a {
    color: var(--text-tertiary);
}
.footer-links a:hover {
    color: var(--primary-500);
}

.social-links {
    display: flex;
    gap: var(--space-4);
}
.social-link {
    width: 40px;
    height: 40px;
    background: var(--surface-primary);
    border: 1px solid var(--border-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    transition: all var(--transition-base);
}
.social-link:hover {
    background: var(--primary-500);
    color: white;
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-8);
    border-top: 1px solid var(--border-secondary);
    color: var(--text-tertiary);
}

/* Auth Pages */
.auth-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-8);
}

.auth-container {
    max-width: 450px;
    width: 100%;
    background: var(--surface-primary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-3xl);
    padding: var(--space-8);
    backdrop-filter: blur(20px);
}

.auth-header {
    text-align: center;
    margin-bottom: var(--space-8);
}
.auth-title {
    font-size: 2rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: var(--space-2);
}
.auth-subtitle {
    color: var(--text-tertiary);
}

.auth-tabs {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-6);
    border-bottom: 2px solid var(--border-secondary);
}
.auth-tab {
    flex: 1;
    padding: var(--space-3);
    background: none;
    border: none;
    color: var(--text-tertiary);
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
}
.auth-tab.active {
    color: var(--primary-500);
    border-bottom-color: var(--primary-500);
}

.auth-form {
    display: none;
}
.auth-form.active {
    display: block;
}

.input-group {
    margin-bottom: var(--space-4);
}
.input-label {
    display: block;
    margin-bottom: var(--space-2);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.875rem;
}
.input-field {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: var(--surface-secondary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}
.input-field:hover {
    border-color: var(--primary-400);
}
.input-field:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
}

/* تحسين عنصر select */
.select {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: var(--surface-secondary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
    cursor: pointer;
}
.select:hover {
    border-color: var(--primary-400);
}
.select:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
}

.textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: var(--surface-secondary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 1rem;
    resize: vertical;
    transition: all var(--transition-fast);
}
.textarea:hover {
    border-color: var(--primary-400);
}
.textarea:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
}

.checkbox-wrapper {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
}
.checkbox {
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid var(--border-secondary);
    border-radius: var(--radius-sm);
    background: var(--surface-secondary);
    cursor: pointer;
}

.username-preview {
    margin-top: 0.5rem;
    padding: 0.5rem;
    background: var(--surface-secondary);
    border-radius: var(--radius-lg);
}

.social-login {
    margin-top: var(--space-6);
}
.social-btn {
    transition: transform var(--transition-fast);
}
.social-btn:hover {
    transform: translateY(-3px);
}

/* Toast */
.toast-container {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.alert {
    padding: var(--space-4) var(--space-6);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    animation: slideInRight 0.3s ease;
}
.alert-success {
    background: #d1fae5;
    border: 1px solid #10b981;
    color: #065f46;
}
.alert-error {
    background: #fee2e2;
    border: 1px solid #ef4444;
    color: #b91c1c;
}
.alert-info {
    background: #dbeafe;
    border: 1px solid #3b82f6;
    color: #1e3a8a;
}

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

/* Particle Canvas */
#particleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

/* أنماط إضافية للوحة التحكم (مدمجة من dashboard.css ولكن بشكل أساسي) */
.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    background: var(--surface-secondary);
    color: var(--text-secondary);
}
.badge-primary {
    background: var(--primary-500);
    color: white;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    .hero-buttons {
        flex-direction: column;
    }
    .steps {
        flex-direction: column;
        align-items: center;
    }
    .step:not(:last-child)::after {
        display: none;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .social-links {
        justify-content: center;
    }
}