/* ================================
   style.css - TAM DOSYA (SON HALİ)
   ================================ */

:root {
    --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --card-bg: rgba(255, 255, 255, 0.95);
    --primary: #0f2c59;
    --primary-hover: #1b3b75;
    --accent: #3b82f6;
    --accent-light: #60a5fa;
    --accent-glow: rgba(59, 130, 246, 0.15);
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --success: #22c55e;
    --success-bg: #dcfce7;
    --success-text: #14532d;
    --error-bg: #fee2e2;
    --error-text: #7f1d1d;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --shadow: 0 20px 25px -5px rgba(0,0,0,0.2), 0 10px 10px -5px rgba(0,0,0,0.1);
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 14px;
    --radius-xs: 12px;
    --transition: all 0.25s cubic-bezier(0.4,0,0.2,1);
    --bottom-nav-bg: #f8fafc;
}

/* ===== KARANLIK MOD DEĞİŞKENLERİ ===== */
body.dark-mode {
    --bg-gradient: linear-gradient(135deg, #020617 0%, #0f172a 100%);
    --card-bg: rgba(30,41,59,0.95);
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --border: #334155;
    --shadow: 0 20px 25px -5px rgba(0,0,0,0.8), 0 10px 10px -5px rgba(0,0,0,0.5);
    --success-bg: rgba(34,197,94,0.15);
    --success-text: #86efac;
    --error-bg: rgba(239,68,68,0.15);
    --error-text: #fca5a5;
    --bottom-nav-bg: #1e293b;
}

* { box-sizing: border-box; }

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background: var(--bg-gradient);
    color: var(--text-main);
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    transition: background 0.3s ease, color 0.3s ease;
    -webkit-font-smoothing: antialiased;
}

.container {
    width: 100%;
    max-width: 480px;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 24px 24px 32px 24px;
    margin: 16px;
    height: 94vh;
    max-height: 920px;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.2);
    animation: fadeIn 0.4s ease-out;
    transition: background 0.3s ease, border-color 0.3s ease;
}

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

.scrollable-content {
    flex: 1;
    overflow-y: auto;
    padding-bottom: 20px;
    scroll-behavior: smooth;
}
.scrollable-content::-webkit-scrollbar { width:6px; }
.scrollable-content::-webkit-scrollbar-track { background:transparent; }
.scrollable-content::-webkit-scrollbar-thumb { background:#cbd5e1; border-radius:10px; }
body.dark-mode .scrollable-content::-webkit-scrollbar-thumb { background:#475569; }

.screen { animation: screenEnter 0.35s cubic-bezier(0.4,0,0.2,1); }
@keyframes screenEnter {
    from { opacity:0; transform:translateY(12px) scale(0.98); }
    to { opacity:1; transform:translateY(0) scale(1); }
}
.hidden { display:none !important; }
.center { text-align:center; }

h1, h2, h3 {
    color: var(--text-main);
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-top: 0;
    line-height: 1.3;
}
h2 { font-size: 1.35rem; margin-bottom:8px; }
h3 { font-size: 1.1rem; margin-bottom:6px; }
p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 0 0 12px 0;
}
a { color: var(--accent); text-decoration:none; transition:var(--transition); }
a:hover, a:focus { text-decoration:underline; color:var(--accent-light); }

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border);
    padding-bottom: 14px;
    flex-wrap: wrap;
    gap: 8px;
}
.header-left { display:flex; align-items:center; gap:8px; }

.back-btn {
    border: 2px solid var(--primary);
    border-radius: 6px;
    padding: 4px;
    background: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s, border-color 0.2s, color 0.2s;
    color: var(--text-main);
}
.back-btn:hover {
    transform: scale(1.05);
    border-color: var(--accent);
}
body.dark-mode .back-btn {
    border-color: #94a3b8;
}
body.dark-mode .back-btn:hover {
    border-color: var(--accent);
}

.header-row {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border);
    padding-bottom: 8px;
}
.header-row .back-btn {
    flex-shrink: 0;
    color: var(--text-main);
}
.header-row h2, .header-row .title {
    margin-top: 1cm;
    position: relative;
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 0;
}

.btn-primary {
    background: var(--primary);
    color: white;
    border: none;
    padding: 14px;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    width: 100%;
    margin-top: 15px;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(15,44,89,0.3);
    outline: none;
    position: relative;
    overflow: hidden;
}
.btn-primary::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    transform: translate(-50%,-50%);
    transition: width 0.4s ease, height 0.4s ease;
}
.btn-primary:active::after {
    width: 300px;
    height: 300px;
}
.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(15,44,89,0.4);
}
.btn-primary:active { transform: translateY(0) scale(0.98); }
.btn-primary:focus-visible { outline: 2px solid var(--accent); outline-offset:2px; }
.btn-primary.accent-gradient {
    background: linear-gradient(135deg, var(--accent) 0%, #2563eb 100%);
    box-shadow: 0 4px 12px rgba(59,130,246,0.3);
}
.btn-primary.accent-gradient:hover {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    box-shadow: 0 6px 20px rgba(59,130,246,0.4);
}
.btn-primary.success-gradient {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    box-shadow: 0 4px 12px rgba(16,185,129,0.3);
}
.btn-primary.success-gradient:hover {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
    box-shadow: 0 6px 20px rgba(16,185,129,0.4);
}
.btn-primary.muted {
    background: #64748b;
    box-shadow: none;
    margin-top: 10px;
}
.btn-primary.muted:hover {
    background: #475569;
    box-shadow: 0 4px 12px rgba(100,116,139,0.3);
}
.btn-danger {
    background: var(--danger);
    color: white;
    border: none;
    padding: 14px;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    width: 100%;
    margin-top: 10px;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(239,68,68,0.3);
    outline: none;
}
.btn-danger:hover { background:var(--danger-hover); transform:translateY(-2px); }
.btn-danger:active { transform:translateY(0) scale(0.98); }

.form-group { margin-bottom:14px; text-align:left; }
.form-label {
    display:block;
    font-size:0.85rem;
    font-weight:600;
    color:var(--text-muted);
    margin-bottom:6px;
    letter-spacing:0.2px;
}
.form-input {
    width:100%;
    padding:14px 16px;
    border:2px solid var(--border);
    border-radius:var(--radius-xs);
    font-size:0.95rem;
    font-family:inherit;
    box-sizing:border-box;
    outline:none;
    transition:border-color 0.2s, box-shadow 0.2s;
    background:transparent;
    color:var(--text-main);
}
.form-input::placeholder { color:var(--text-muted); opacity:0.7; }
.form-input:focus {
    border-color:var(--accent);
    box-shadow:0 0 0 3px var(--accent-glow);
}
select.form-input {
    cursor:pointer;
    appearance:none;
    background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2364748b' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat:no-repeat;
    background-position:right 14px center;
    padding-right:40px;
}
textarea.form-input { resize:vertical; min-height:80px; }

.auth-links { display:flex; flex-direction:column; gap:10px; margin-top:16px; align-items:center; }
.auth-link-btn {
    background:none;
    border:none;
    font-weight:700;
    font-size:0.9rem;
    cursor:pointer;
    color:var(--text-muted);
    transition:color 0.2s;
    padding:4px;
}
.auth-link-btn.forgot { color:var(--danger); }
.auth-link-btn:hover { color:var(--primary); }

.hero-banner {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
    padding:30px 20px;
    border-radius:var(--radius-md);
    color:white;
    margin-bottom:24px;
    box-shadow:0 10px 20px rgba(15,44,89,0.3);
    text-align:center;
}
.hero-banner .title { font-size:1.4rem; font-weight:800; letter-spacing:-0.5px; line-height:1.2; }
.hero-banner .subtitle { font-size:1.3rem; font-weight:700; margin-top:4px; opacity:0.95; }

.category-grid, .unit-grid {
    display:grid;
    gap:10px;
    margin-top:15px;
}
.category-grid { grid-template-columns:1fr 1fr; }
.unit-grid {
    grid-template-columns:repeat(5, 1fr);
    max-height:320px;
    overflow-y:auto;
    padding:4px;
    gap:8px;
}
@media (max-width:380px) { .unit-grid { grid-template-columns:repeat(4,1fr); } }
@media (max-width:320px) { .unit-grid { grid-template-columns:repeat(3,1fr); } }

/* ===== KATEGORİ BUTONLARI ===== */
.category-btn {
    background: var(--primary);
    border: 2px solid var(--primary);
    border-radius: var(--radius-sm);
    padding: 12px 8px;
    font-size: 0.82rem;
    font-weight: 700;
    color: white;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    outline: none;
    position: relative;
    overflow: hidden;
}
.category-btn:hover {
    background: var(--primary-hover);
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px var(--accent-glow);
}
.category-btn:active { transform:translateY(0) scale(0.96); }

body.dark-mode .category-btn {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}
body.dark-mode .category-btn:hover {
    background: var(--primary-hover);
    border-color: var(--accent);
    box-shadow: 0 6px 15px var(--accent-glow);
    transform: translateY(-2px);
}

/* ===== ÜNİTE BUTONLARI ===== */
.unit-btn {
    background: #f8fafc;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 4px;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-main);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    outline: none;
    position: relative;
    overflow: hidden;
    min-height: 44px;
}
.unit-btn:hover:not(:disabled) {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px var(--accent-glow);
}
.unit-btn:active:not(:disabled) { transform:translateY(0) scale(0.96); }
.unit-btn.locked {
    background: #f1f5f9;
    color: #94a3b8;
    border-color: #e2e8f0;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.unit-btn.completed {
    background: #22c55e;
    border-color: #22c55e;
    color: #ffffff !important;
    text-shadow: none;
    -webkit-text-fill-color: #ffffff;
}
.unit-btn.completed .tick,
.unit-btn.completed .check,
.unit-btn.completed .icon-check,
.unit-btn.completed::after {
    display: none !important;
}

.unit-btn.ad-unlock {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border-color: #f59e0b;
    color: #92400e;
    cursor: pointer;
}

body.dark-mode .unit-btn {
    background: #f8fafc;
    color: #1e293b !important;
    border-color: #e2e8f0;
    text-shadow: none;
    -webkit-text-fill-color: #1e293b;
}
body.dark-mode .unit-btn:hover:not(:disabled) {
    background: var(--accent);
    color: #ffffff !important;
    border-color: var(--accent);
    text-shadow: none;
    -webkit-text-fill-color: #ffffff;
}
body.dark-mode .unit-btn.locked {
    background: #f1f5f9;
    color: #94a3b8 !important;
    border-color: #e2e8f0;
    opacity: 1;
    text-shadow: none;
    -webkit-text-fill-color: #94a3b8;
}
body.dark-mode .unit-btn.completed {
    background: #22c55e;
    border-color: #22c55e;
    color: #ffffff !important;
    text-shadow: none;
    -webkit-text-fill-color: #ffffff;
}
body.dark-mode .unit-btn.completed .tick,
body.dark-mode .unit-btn.completed .check,
body.dark-mode .unit-btn.completed .icon-check,
body.dark-mode .unit-btn.completed::after {
    display: none !important;
}
body.dark-mode .unit-btn.ad-unlock {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border-color: #f59e0b;
    color: #92400e !important;
    text-shadow: none;
    -webkit-text-fill-color: #92400e;
}
body.dark-mode .unit-btn span,
body.dark-mode .unit-btn i,
body.dark-mode .unit-btn strong,
body.dark-mode .unit-btn em {
    color: inherit !important;
    -webkit-text-fill-color: inherit;
}

body.dark-mode .option-btn {
    background: #ffffff;
    color: #1e293b;
    border-color: #e2e8f0;
}
body.dark-mode .option-btn:hover:not(:disabled) {
    background: #f8fafc;
    border-color: var(--accent);
    color: #1e293b;
    box-shadow: 0 6px 15px var(--accent-glow);
    transform: translateY(-2px);
}
body.dark-mode .option-btn.correct {
    background: var(--success-bg) !important;
    color: var(--success-text) !important;
}
body.dark-mode .option-btn.wrong {
    background: var(--error-bg) !important;
    color: var(--error-text) !important;
}
body.dark-mode .profile-card {
    background: #1e293b;
    border-color: #334155;
}
body.dark-mode .profile-card h3 {
    color: #f1f5f9;
}
body.dark-mode .setting-group {
    background: #1e293b;
    border-color: #334155;
}
body.dark-mode .setting-label {
    color: #f1f5f9;
}
body.dark-mode .setting-desc {
    color: #94a3b8;
}
body.dark-mode .form-input {
    background: #0f172a;
    color: #f1f5f9;
    border-color: #334155;
}
body.dark-mode .form-input::placeholder {
    color: #64748b;
}

.hearts {
    color:var(--danger);
    font-size:0.95rem;
    font-weight:700;
    background:#fef2f2;
    padding:6px 12px;
    border-radius:20px;
    display:flex;
    align-items:center;
    gap:4px;
    transition:var(--transition);
}
body.dark-mode .hearts { background:rgba(239,68,68,0.15); }

.score {
    color:var(--primary);
    font-weight:700;
    background:#eef2ff;
    padding:6px 12px;
    border-radius:20px;
    font-size:0.85rem;
    transition:var(--transition);
}
body.dark-mode .score { background:rgba(59,130,246,0.15); color:var(--accent-light); }

.question {
    font-size:1.15rem;
    font-weight:700;
    line-height:1.5;
    margin-bottom:20px;
    color: var(--text-main);
    transition:color 0.3s ease;
}
.options { display:flex; flex-direction:column; gap:10px; }
button.option-btn {
    background:#ffffff;
    border:2px solid var(--border);
    border-radius:var(--radius-sm);
    padding:14px 18px;
    font-size:0.95rem;
    cursor:pointer;
    text-align:left;
    transition:var(--transition);
    font-weight:600;
    color:var(--text-main);
    box-shadow:0 2px 4px rgba(0,0,0,0.02);
    outline:none;
    position:relative;
    font-family:inherit;
}
button.option-btn:hover:not(:disabled) {
    border-color:var(--accent);
    background:#f8fafc;
    transform:translateY(-2px);
    box-shadow:0 6px 15px var(--accent-glow);
}
button.option-btn:active:not(:disabled) { transform:translateY(0) scale(0.98); }
button.option-btn:focus-visible { outline:2px solid var(--accent); outline-offset:2px; }
.option-btn.correct {
    background:var(--success-bg) !important;
    border-color:var(--success) !important;
    color:var(--success-text) !important;
    transform:translateY(-1px);
    box-shadow:0 4px 12px rgba(34,197,94,0.2);
}
.option-btn.wrong {
    background:var(--error-bg) !important;
    border-color:var(--danger) !important;
    color:var(--error-text) !important;
}
.option-btn:disabled { cursor:default; opacity:0.9; }

@keyframes hintPulse {
    0% { box-shadow:0 0 0 0 rgba(255,69,0,0.8); }
    50% { box-shadow:0 0 20px 10px rgba(255,140,0,0.6); }
    100% { box-shadow:0 0 0 0 rgba(255,69,0,0); }
}
.option-btn.hint-glow {
    animation:hintPulse 1s ease 2;
    border-color:#ff4500 !important;
    border-width:3px !important;
    background:rgba(255,69,0,0.1) !important;
}

.bottom-nav {
    display:flex;
    justify-content:space-around;
    align-items:center;
    background:var(--bottom-nav-bg);
    border-top:2px solid var(--border);
    padding:10px 0 4px 0;
    margin-top:auto;
    border-radius:0 0 16px 16px;
    transition:background 0.3s ease, border-color 0.3s ease;
}
.nav-item {
    background:none;
    border:none;
    display:flex;
    flex-direction:column;
    align-items:center;
    gap:2px;
    font-size:0.72rem;
    font-weight:700;
    color:var(--text-muted);
    cursor:pointer;
    transition:color 0.2s, transform 0.2s;
    flex:1;
    padding:4px;
    outline:none;
    border-radius:8px;
}
.nav-item span.icon { font-size:1.2rem; transition:transform 0.2s; }
.nav-item:hover { color:var(--accent); }
.nav-item:hover span.icon { transform:translateY(-2px); }
.nav-item.active { color:var(--accent); }
.nav-item:focus-visible { outline:2px solid var(--accent); outline-offset:2px; }
.test-nav-btn {
    background:linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    border-radius:30px !important;
    padding:6px 16px !important;
    color:white !important;
    transition:var(--transition);
}
.test-nav-btn:hover { transform:scale(1.05); box-shadow:0 4px 15px rgba(245,158,11,0.4); }
.test-nav-btn .icon { font-size:1.1rem; }
.test-nav-btn span { font-weight:800; }

.drawer-overlay {
    position:absolute;
    top:0;
    left:0;
    width:100%;
    height:100%;
    background:rgba(0,0,0,0.5);
    z-index:20;
    display:flex;
    transition:opacity 0.3s ease;
    backdrop-filter:blur(4px);
}
.drawer-content {
    width:280px;
    height:100%;
    background:var(--primary);
    color:white;
    padding:24px;
    box-sizing:border-box;
    display:flex;
    flex-direction:column;
    gap:6px;
    box-shadow:5px 0 25px rgba(0,0,0,0.3);
    overflow-y:auto;
}
.drawer-logo-area {
    background:white;
    padding:16px;
    border-radius:var(--radius-md);
    text-align:center;
    color:var(--primary);
    font-weight:800;
    margin-bottom:10px;
    box-shadow:0 4px 12px rgba(0,0,0,0.1);
}
.drawer-item {
    background:none;
    border:none;
    color:rgba(255,255,255,0.85);
    padding:12px 16px;
    border-radius:var(--radius-xs);
    font-size:0.95rem;
    font-weight:600;
    cursor:pointer;
    text-align:left;
    display:flex;
    align-items:center;
    gap:12px;
    transition:var(--transition);
    outline:none;
    font-family:inherit;
}
.drawer-item:hover, .drawer-item.active { background:var(--accent); color:white; }
.drawer-item:focus-visible { outline:2px solid white; outline-offset:2px; }

.profile-card {
    background:#f8fafc;
    border:1px solid var(--border);
    border-radius:var(--radius-md);
    padding:16px;
    margin-bottom:16px;
    text-align:left;
    transition:background 0.3s ease, border-color 0.3s ease, transform 0.2s;
}
.profile-card:hover { transform:translateY(-1px); box-shadow:0 4px 12px rgba(0,0,0,0.05); }
.profile-card h3 { margin-bottom:8px; font-size:1rem; color:var(--primary); }
.profile-card.danger-zone { border-color:#fca5a5; }
body.dark-mode .profile-card.danger-zone { border-color:rgba(239,68,68,0.4); }

.setting-group {
    background:#f8fafc;
    border:1px solid var(--border);
    border-radius:var(--radius-sm);
    padding:14px 16px;
    margin-bottom:12px;
    display:flex;
    justify-content:space-between;
    align-items:center;
    transition:background 0.3s ease, border-color 0.3s ease;
}
.setting-label { font-weight:700; color:var(--text-main); font-size:0.95rem; }
.setting-desc { font-size:0.8rem; color:var(--text-muted); margin-top:2px; }
.theme-circles { display:flex; gap:10px; }
.circle-btn {
    width:28px;
    height:28px;
    border-radius:50%;
    border:2px solid transparent;
    cursor:pointer;
    transition:transform 0.2s, box-shadow 0.2s;
    outline:none;
    position:relative;
}
.circle-btn:hover { transform:scale(1.15); }
.circle-btn:focus-visible { border-color:var(--text-main); box-shadow:0 0 0 3px var(--accent-glow); }
.circle-btn.active-theme::after {
    content:'✓';
    position:absolute;
    top:50%;
    left:50%;
    transform:translate(-50%,-50%);
    color:white;
    font-size:0.75rem;
    font-weight:800;
    text-shadow:0 1px 2px rgba(0,0,0,0.3);
}
.toggle-switch {
    appearance:none;
    width:44px;
    height:24px;
    background:#cbd5e1;
    border-radius:12px;
    position:relative;
    cursor:pointer;
    outline:none;
    transition:background 0.3s;
    flex-shrink:0;
}
.toggle-switch::after {
    content:'';
    position:absolute;
    width:20px;
    height:20px;
    background:white;
    border-radius:50%;
    top:2px;
    left:2px;
    transition:transform 0.3s cubic-bezier(0.4,0,0.2,1);
    box-shadow:0 2px 4px rgba(0,0,0,0.2);
}
.toggle-switch:checked { background:var(--accent); }
.toggle-switch:checked::after { transform:translateX(20px); }
body.dark-mode .toggle-switch { background:#475569; }

.progress-bar-track {
    background:#e2e8f0;
    border-radius:10px;
    height:12px;
    width:100%;
    margin-top:10px;
    overflow:hidden;
}
body.dark-mode .progress-bar-track { background:#334155; }
.progress-bar-fill {
    background:var(--accent);
    height:100%;
    border-radius:10px;
    transition:width 0.6s cubic-bezier(0.4,0,0.2,1);
    box-shadow:0 0 10px rgba(59,130,246,0.3);
}

.centered-page {
    display:flex;
    flex-direction:column;
    justify-content:center;
    min-height:60vh;
    text-align:center;
}
.big-emoji {
    font-size:3rem;
    margin-bottom:10px;
    display:block;
    animation:bounceIn 0.5s cubic-bezier(0.68,-0.55,0.265,1.55);
}
@keyframes bounceIn {
    0% { transform:scale(0); opacity:0; }
    50% { transform:scale(1.2); }
    100% { transform:scale(1); opacity:1; }
}
.subtitle-text { font-size:0.9rem; color:var(--text-muted); margin-top:4px; display:block; }
.timer-display {
    font-weight:700;
    color:var(--danger);
    font-size:1.1rem;
    margin-left:10px;
    background:#fef2f2;
    padding:4px 10px;
    border-radius:20px;
    font-variant-numeric:tabular-nums;
}
body.dark-mode .timer-display { background:rgba(239,68,68,0.15); }

#app-toast {
    position:fixed;
    top:20px;
    left:50%;
    transform:translateX(-50%);
    background:#1e293b;
    color:white;
    padding:14px 28px;
    border-radius:var(--radius-sm);
    font-weight:700;
    font-size:0.9rem;
    box-shadow:0 10px 25px rgba(0,0,0,0.3);
    z-index:100;
    opacity:0;
    transition:opacity 0.3s ease, transform 0.3s ease;
    pointer-events:none;
    max-width:90vw;
    text-align:center;
    backdrop-filter:blur(10px);
    border:1px solid rgba(255,255,255,0.1);
}
body.dark-mode #app-toast { background:#0f172a; border-color:#334155; }

.menu-burger-btn {
    background:none;
    border:none;
    cursor:pointer;
    font-size:1.4rem;
    color:var(--primary);
    padding:8px;
    border-radius:8px;
    transition:var(--transition);
    outline:none;
    display:flex;
    align-items:center;
    justify-content:center;
    width:40px;
    height:40px;
}
.menu-burger-btn:hover { background:rgba(59,130,246,0.1); color:var(--accent); }
.menu-burger-btn:focus-visible { outline:2px solid var(--accent); outline-offset:2px; }
body.dark-mode .menu-burger-btn { color:var(--text-main); }
body.dark-mode .menu-burger-btn:hover { background:rgba(59,130,246,0.2); color:var(--accent-light); }

.modal-overlay {
    position:absolute;
    top:0;
    left:0;
    width:100%;
    height:100%;
    background:rgba(0,0,0,0.6);
    z-index:30;
    display:flex;
    justify-content:center;
    align-items:center;
    backdrop-filter:blur(4px);
}
.modal-content {
    background:var(--card-bg);
    border-radius:var(--radius-md);
    padding:24px;
    max-width:400px;
    width:90%;
    box-shadow:0 20px 40px rgba(0,0,0,0.3);
    animation:modalIn 0.3s ease;
}
@keyframes modalIn {
    from { transform:scale(0.9); opacity:0; }
    to { transform:scale(1); opacity:1; }
}
.modal-header {
    display:flex;
    justify-content:space-between;
    align-items:center;
    margin-bottom:16px;
}
.modal-header h2 { margin:0; color:var(--text-main); }
.modal-close-btn {
    background:none;
    border:none;
    font-size:1.5rem;
    cursor:pointer;
    color:var(--text-muted);
    padding:4px 8px;
    border-radius:8px;
    transition:var(--transition);
}
.modal-close-btn:hover { background:var(--error-bg); color:var(--danger); }
.modal-body { text-align:center; color:var(--text-main); }
.test-info { margin:12px 0; font-weight:600; color:var(--text-muted); }

.custom-modal-box {
    max-width:420px;
    width:90%;
    padding:20px;
}
.custom-modal-box .modal-body {
    text-align:center;
    font-size:1rem;
    color:var(--text-main);
    line-height:1.6;
}
.custom-modal-box .modal-body button {
    margin-top:16px;
}

.bilgi-karti-box {
    max-width:440px;
    width:90%;
    padding:20px;
    background: rgba(255,255,255,0.75);
    backdrop-filter: blur(8px);
    border-radius: var(--radius-md);
    border: 4px solid #d4a373;
    box-shadow: 0 0 30px rgba(212,163,115,0.3), 0 0 60px rgba(212,163,115,0.1);
    position: relative;
    overflow: hidden;
}
.bilgi-karti-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(255,215,0,0.08) 0%, transparent 60%),
        radial-gradient(circle at 80% 70%, rgba(255,215,0,0.06) 0%, transparent 50%),
        radial-gradient(circle at 50% 90%, rgba(255,215,0,0.04) 0%, transparent 40%),
        repeating-linear-gradient(45deg, rgba(212,163,115,0.02) 0px, rgba(212,163,115,0.02) 20px, rgba(255,215,0,0.02) 20px, rgba(255,215,0,0.02) 40px);
    pointer-events: none;
    z-index: 0;
}
.bilgi-karti-box::after {
    content: '';
    position: absolute;
    top: 8px;
    left: 8px;
    right: 8px;
    bottom: 8px;
    border: 2px solid rgba(212,163,115,0.3);
    border-radius: var(--radius-sm);
    pointer-events: none;
    z-index: 0;
}
.bilgi-karti-box .modal-header,
.bilgi-karti-box .modal-body {
    position: relative;
    z-index: 1;
}
.bilgi-karti-box .modal-body {
    padding: 10px 0;
}
.bilgi-karti-box .modal-body h3 {
    font-size: 1.3rem;
    color: #7c5a3b;
    margin-bottom: 12px;
    border-bottom: 2px dashed rgba(212,163,115,0.4);
    padding-bottom: 8px;
}
.bilgi-karti-box .modal-body p {
    font-size: 1.05rem;
    line-height: 1.7;
    background: rgba(255,255,255,0.6);
    padding: 16px;
    border-radius: var(--radius-xs);
    border-left: 4px solid #d4a373;
}
body.dark-mode .bilgi-karti-box {
    background: rgba(30,41,59,0.85);
    border-color: #b8875a;
}
body.dark-mode .bilgi-karti-box::before {
    background: 
        radial-gradient(circle at 20% 30%, rgba(255,215,0,0.12) 0%, transparent 60%),
        radial-gradient(circle at 80% 70%, rgba(255,215,0,0.08) 0%, transparent 50%),
        repeating-linear-gradient(45deg, rgba(184,135,90,0.05) 0px, rgba(184,135,90,0.05) 20px, rgba(255,215,0,0.05) 20px, rgba(255,215,0,0.05) 40px);
}
body.dark-mode .bilgi-karti-box .modal-body h3 {
    color: #fcd34d;
}
body.dark-mode .bilgi-karti-box .modal-body p {
    background: rgba(15,23,42,0.6);
    border-left-color: #b8875a;
}

/* Mecelle Kart Çevirme Efekti – daha estetik başlık */
.flip-card {
    background-color: transparent;
    width: 100%;
    height: 220px;
    perspective: 1000px;
    margin: 20px 0;
    cursor: pointer;
}
.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s;
    transform-style: preserve-3d;
}
.flip-card-front, .flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: var(--radius-md);
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.flip-card-front {
    background: var(--primary);
    color: white;
}
.flip-card-front p {
    color: rgba(255,255,255,0.95);
    margin: 6px 0;
}
.flip-card-back {
    background: var(--accent);
    color: white;
    transform: rotateY(180deg);
}
.flip-card-back p {
    color: white;
    font-style: italic;
}
body.dark-mode .flip-card-front {
    background: #1e293b;
}
body.dark-mode .flip-card-back {
    background: #0f172a;
}
/* Başlık estetiği */
#mecelle-card-title {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--primary);
    text-shadow: 0 1px 2px rgba(0,0,0,0.05);
    border-bottom: 3px solid var(--accent);
    padding-bottom: 6px;
    display: inline-block;
    margin-bottom: 4px;
}
body.dark-mode #mecelle-card-title {
    color: var(--accent-light);
}

.reward-cards {
    display:flex;
    flex-direction:column;
    gap:20px;
    margin-top:20px;
}
.reward-card {
    background:var(--card-bg);
    border:2px solid var(--border);
    border-radius:var(--radius-sm);
    padding:20px;
    box-shadow:0 4px 12px rgba(0,0,0,0.05);
}
.reward-card .reward-icon {
    font-size:2.5rem;
    display:block;
    margin-bottom:8px;
}
.reward-card p { font-size:1.1rem; font-weight:600; color:var(--text-main); }

.reward-progress {
    display:flex;
    justify-content:center;
    gap:16px;
    margin:16px 0;
}
.reward-step {
    width:40px;
    height:40px;
    border-radius:50%;
    background:#e2e8f0;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:1.2rem;
    transition:background 0.3s, transform 0.3s;
    border:2px solid transparent;
}
.reward-step.filled { background:#22c55e; border-color:#16a34a; transform:scale(1.05); }
body.dark-mode .reward-step { background:#334155; }
body.dark-mode .reward-step.filled { background:#22c55e; }

#claim-chest-btn { margin-top:10px; }
#claim-chest-btn:disabled { opacity:0.5; cursor:not-allowed; transform:none !important; }

#favorite-btn {
    background:#fef3c7;
    border:2px solid #f59e0b;
    color:#92400e;
}
#favorite-btn.favorited { background:#fbbf24; border-color:#d97706; }
#favorite-btn:hover { background:#f59e0b; color:white; }

#prev-question-btn {
    background:#e0f2fe;
    border:2px solid #38bdf8;
    color:#0369a1;
}
#prev-question-btn:hover { background:#38bdf8; color:white; }

#hint-btn-header {
    background:none;
    border:none;
    font-size:1.2rem;
    cursor:pointer;
    font-weight:700;
    color:var(--accent);
    padding:4px 8px;
    border-radius:8px;
    transition:var(--transition);
}
#hint-btn-header:hover { background:var(--accent-glow); }

#screen-bilgic .bilgic-item {
    background:var(--card-bg);
    border:2px solid var(--border);
    border-radius:var(--radius-sm);
    padding:16px;
    margin-bottom:16px;
    text-align:left;
    transition:var(--transition);
}
#screen-bilgic .bilgic-item h3 { margin-top:0; color:var(--accent); }
#screen-bilgic .bilgic-item p { margin-bottom:8px; }
#screen-bilgic .bilgic-item .btn-primary { margin-top:8px; }

.leaderboard-item {
    display:flex;
    justify-content:space-between;
    padding:10px 16px;
    border-bottom:1px solid var(--border);
    font-weight:600;
}
.leaderboard-item .rank { color:var(--text-muted); font-weight:400; }
.leaderboard-item .name { flex:1; margin-left:12px; }
.leaderboard-item .score { color:var(--accent); }

#banner-ad {
    background: #f1f5f9;
    text-align: center;
    padding: 8px;
    border-radius: 8px;
    margin-top: 8px;
    border: 1px solid var(--border);
    transition: background 0.3s, border-color 0.3s;
}
body.dark-mode #banner-ad {
    background: #1e293b;
    border-color: #334155;
}
#banner-ad p {
    margin: 0;
    font-size: 0.8rem;
    color: var(--text-muted);
}

@media (max-height:700px) {
    .container { height:98vh; margin:4px; padding:16px 16px 24px 16px; }
    .hero-banner { padding:20px 16px; margin-bottom:16px; }
    .hero-banner .title { font-size:1.2rem; }
    .hero-banner .subtitle { font-size:1.1rem; }
}
@media (max-width:360px) {
    .container { padding:16px; }
    h2 { font-size:1.15rem; }
    .category-btn, .unit-btn { font-size:0.75rem; padding:10px 4px; }
}