/* ==============================================
   TOFAS Exam Platform - Main Styles
   ============================================== */
@import url('https://fonts.googleapis.com/css2?family=Tajawal:wght@300;400;500;700;800;900&display=swap');

:root {
    --primary: #0089cf;
    --primary-dark: #006ba1;
    --primary-light: #00aaff;
    --dark-bg: #0a0f24;
    --dark-bg-2: #1c2755;
    --dark-bg-3: #112244;
    --card-bg: rgba(255, 255, 255, 0.08);
    --card-bg-hover: rgba(255, 255, 255, 0.12);
    --card-border: rgba(255, 255, 255, 0.15);
    --text-primary: #ffffff;
    --text-secondary: #b0bec5;
    --text-muted: #78909c;
    --success: #28a745;
    --success-light: #d4edda;
    --danger: #dc3545;
    --danger-light: #f8d7da;
    --warning: #ffc107;
    --warning-light: #fff3cd;
    --info: #17a2b8;
    --gold: #fcd34d;
    --green-accent: #7aff7a;
    --pink-accent: #ff6ec4;
    --cyan-accent: #00eaff;
    --border-light: rgba(255, 255, 255, 0.1);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.2);
    --blur: blur(12px);
    --radius: 16px;
    --radius-sm: 10px;
    --radius-xs: 6px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    overflow-x: hidden;
}

body {
    font-family: 'Tajawal', 'Segoe UI', Tahoma, sans-serif;
    background: linear-gradient(135deg, var(--dark-bg), var(--dark-bg-2), var(--dark-bg-3));
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--dark-bg); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary-light); }

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; }

.gradient-title {
    font-size: 2rem;
    font-weight: 900;
    background: linear-gradient(90deg, var(--cyan-accent), var(--green-accent), var(--gold), var(--pink-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 1px;
    animation: titleGlow 3s infinite alternate;
}

@keyframes titleGlow {
    0% { filter: drop-shadow(0px 0px 5px rgba(0, 234, 255, 0.3)); }
    100% { filter: drop-shadow(0px 0px 15px rgba(255, 110, 196, 0.3)); }
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: white;
    box-shadow: 0 4px 15px rgba(0, 137, 207, 0.3);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 137, 207, 0.4);
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
}

.btn-success { background: linear-gradient(135deg, #34d058, var(--success)); color: white; }
.btn-success:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(40, 167, 69, 0.4); }

.btn-danger { background: linear-gradient(135deg, #ff4757, var(--danger)); color: white; }
.btn-danger:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(220, 53, 69, 0.4); }

.btn-warning { background: linear-gradient(135deg, #ffbe0b, var(--warning)); color: #333; }

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

.btn-ghost {
    background: rgba(255,255,255,0.08);
    color: var(--text-secondary);
    border: 1px solid var(--border-light);
}
.btn-ghost:hover {
    background: rgba(255,255,255,0.15);
    color: white;
}

.btn-sm { padding: 8px 18px; font-size: 0.85rem; }
.btn-lg { padding: 16px 36px; font-size: 1.15rem; }
.btn-block { width: 100%; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }

/* ===== Cards ===== */
.glass-card {
    background: var(--card-bg);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}
.glass-card:hover {
    background: var(--card-bg-hover);
    border-color: rgba(255,255,255,0.2);
    transform: translateY(-2px);
}

/* ===== Inputs ===== */
.form-input {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--border-light);
    border-radius: var(--radius-sm);
    background: rgba(255,255,255,0.06);
    color: white;
    font-family: inherit;
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
}
.form-input:focus {
    border-color: var(--primary);
    background: rgba(255,255,255,0.1);
    box-shadow: 0 0 0 3px rgba(0, 137, 207, 0.15);
}
.form-input::placeholder { color: var(--text-muted); }

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-group { margin-bottom: 20px; }

select.form-input {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='white' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: left 14px center;
    padding-left: 36px;
}
select.form-input option { background: #1a1a2e; color: white; }

textarea.form-input { resize: vertical; min-height: 100px; }

/* ===== Modal ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 5000;
    padding: 20px;
}
.modal-overlay.active { display: flex; }
.modal-content {
    background: linear-gradient(135deg, #1a1a3e, #0d1b2a);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 35px;
    width: 90%;
    max-width: 500px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
    animation: modalIn 0.3s ease;
}
@keyframes modalIn {
    from { opacity: 0; transform: scale(0.9) translateY(20px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

/* ===== Animations ===== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes slideInRight {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
}
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}
@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.animate-fade-in { animation: fadeIn 0.6s ease forwards; }
.animate-fade-in-up { animation: fadeInUp 0.6s ease forwards; }

/* ===== Loading Spinner ===== */
.spinner {
    width: 40px; height: 40px;
    border: 4px solid var(--border-light);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 20px auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loading-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    gap: 15px;
}
.loading-screen p { color: var(--text-muted); font-size: 1.1rem; }

/* ===== Toasts / Alerts ===== */
.toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(-100px);
    padding: 14px 30px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    z-index: 10000;
    transition: transform 0.4s ease;
    box-shadow: var(--shadow);
    max-width: 90%;
}
.toast.show { transform: translateX(-50%) translateY(0); }
.toast-success { background: var(--success); color: white; }
.toast-error { background: var(--danger); color: white; }
.toast-info { background: var(--primary); color: white; }

/* ===== Utility ===== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-gold { color: var(--gold); }
.text-green { color: var(--green-accent); }
.mt-1 { margin-top: 8px; } .mt-2 { margin-top: 16px; } .mt-3 { margin-top: 24px; } .mt-4 { margin-top: 32px; }
.mb-1 { margin-bottom: 8px; } .mb-2 { margin-bottom: 16px; } .mb-3 { margin-bottom: 24px; }
.gap-1 { gap: 8px; } .gap-2 { gap: 16px; } .gap-3 { gap: 24px; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .glass-card { padding: 20px; }
    .gradient-title { font-size: 1.5rem; }
    .btn-lg { padding: 14px 28px; font-size: 1rem; }
    .btn { padding: 10px 22px; font-size: 0.9rem; }
    .form-input { padding: 12px 14px; font-size: 0.95rem; }
    .modal-content { padding: 25px; width: 95%; }
    .toast { font-size: 0.85rem; padding: 10px 20px; max-width: 95%; }
}

@media (max-width: 480px) {
    body { font-size: 14px; }
    .glass-card { padding: 15px; border-radius: 12px; }
    .gradient-title { font-size: 1.3rem; }
    .btn { padding: 10px 18px; font-size: 0.85rem; }
    .btn-lg { padding: 12px 24px; font-size: 0.95rem; }
    .form-input { padding: 11px 12px; }
    .modal-content { padding: 20px; }
    h1 { font-size: 1.4rem; }
    h2 { font-size: 1.2rem; }
    h3 { font-size: 1.05rem; }
}