/* --- MODERN DEĞİŞKENLER (Renkler, Gölgeler, Kenarlar) --- */
:root {
    --primary: #4f46e5; /* Modern Çivit Mavisi */
    --primary-hover: #4338ca;
    --success: #10b981; /* Zümrüt Yeşili */
    --success-hover: #059669;
    --danger: #ef4444; /* Modern Kırmızı */
    --background: #f8fafc; /* Hafif grimsi mavi arka plan */
    --surface: #ffffff; /* Beyaz kart arkaplanı */
    --text-main: #0f172a; /* Koyu lacivert/siyah */
    --text-muted: #64748b; /* Gri metin */
    --border: #e2e8f0;
    --ring: rgba(79, 70, 229, 0.3); /* Focus parlaması */
    --radius-md: 12px;
    --radius-lg: 24px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background);
    color: var(--text-main);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* --- BAŞLIK VE MENÜ --- */
.site-header {
    background-color: var(--primary);
    background-image: linear-gradient(135deg, #4f46e5 0%, #3b82f6 100%);
    color: white;
    padding: 30px 20px;
    text-align: center;
    box-shadow: var(--shadow-md);
}

.site-header h1 {
    font-weight: 700;
    font-size: 28px;
    letter-spacing: -0.5px;
    margin: 0;
}

.modern-nav {
    background: var(--surface);
    padding: 15px 20px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 30px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.modern-nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    max-width: 1200px;
    margin: 0 auto;
}

.modern-nav ul li a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 600;
    padding: 10px 18px;
    border-radius: var(--radius-md);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.modern-nav ul li a:hover {
    background-color: var(--background);
    color: var(--primary);
}

.modern-nav ul li a.nav-highlight {
    background-color: var(--primary);
    color: white;
}

.modern-nav ul li a.nav-danger { color: var(--danger); }
.modern-nav ul li a.nav-danger:hover { background-color: #fef2f2; }

/* --- KART TASARIMLARI (SEO Uyumlu) --- */
main {
    flex: 1;
    width: 95%;
    max-width: 1200px;
    margin: 0 auto;
}

.card, .kutu, .container, .container-vakit, section {
    background-color: var(--surface);
    border-radius: var(--radius-md);
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
    transition: var(--transition);
}

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

h2, h3 {
    color: var(--text-main);
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

/* --- FORMLAR VE INPUTLAR --- */
.inputt, select, .form-control, textarea {
    width: 100%;
    padding: 14px 16px;
    margin: 10px 0;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background-color: var(--background);
    font-size: 15px;
    color: var(--text-main);
    transition: var(--transition);
    font-family: inherit;
}

.inputt:focus, select:focus, textarea:focus {
    border-color: var(--primary);
    outline: none;
    background-color: var(--surface);
    box-shadow: 0 0 0 4px var(--ring);
}

/* --- BUTONLAR --- */
.button, .btn, input[type="submit"] {
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 14px 24px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    transition: var(--transition);
    text-align: center;
    width: 100%;
    display: inline-block;
}

.button:hover, .btn:hover, input[type="submit"]:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--ring);
}

/* --- MODALLAR --- */
.modal {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(8px);
    overflow: auto;
}

.modal-content {
    background-color: var(--surface);
    margin: 5% auto;
    padding: 40px;
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow-lg);
    position: relative;
    animation: modalPop 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalPop {
    0% { transform: scale(0.95) translateY(20px); opacity: 0; }
    100% { transform: scale(1) translateY(0); opacity: 1; }
}

.close {
    position: absolute;
    right: 25px;
    top: 20px;
    font-size: 24px;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
}

.close:hover { color: var(--danger); transform: rotate(90deg); }

/* --- TABLOLAR --- */
table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: 25px 0;
    background: var(--surface);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border);
}

th, td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background-color: var(--background);
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 12px;
}

tr:last-child td { border-bottom: none; }

/* --- TAKVİM TASARIMI --- */
.calendar-container, .charts-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
}

.month-box {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 20px;
    width: 100%;
    max-width: 320px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    text-align: center;
}

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

.days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
    margin-top: 15px;
}

.day {
    padding: 5px;
    text-align: center;
    cursor: pointer;
    border-radius: 50%;
    font-size: 13px;
    font-weight: 500;
    width: 32px;
    height: 32px;
    line-height: 22px;
    margin: auto;
    transition: var(--transition);
}

.day:hover { transform: scale(1.15); box-shadow: var(--shadow-sm); }
.green-bg, .kilan { background-color: var(--success); color: white; }
.red-bg, .kilmayan { background-color: #fee2e2; color: var(--danger); }
.note-day::after {
    content: '';
    display: block;
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    margin: 2px auto 0;
}
.today { background-color: #ffeb3b; font-weight: bold; color: black; }

/* --- KULLANICI ROZET ALANI --- */
.user-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    font-size: 18px;
    font-weight: 600;
}

/* --- ALT BİLGİ --- */
.site-footer {
    background-color: var(--surface);
    color: var(--text-muted);
    text-align: center;
    padding: 24px 0;
    margin-top: auto;
    border-top: 1px solid var(--border);
    font-size: 14px;
}

/* --- MOBİL MENÜ BUTONU --- */
.menu-toggle {
    display: none;
    background-color: var(--surface);
    color: var(--primary);
    padding: 12px;
    text-align: center;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--border);
    transition: var(--transition);
    font-size: 16px;
}

/* --- MOBİL GÖRÜNÜM (Açılır Kapanır Menü) --- */
@media (max-width: 768px) {
    .menu-toggle { display: block; }
    
    .modern-nav ul {
        display: none; /* Mobilde başlangıçta gizli */
        flex-direction: column;
        width: 100%;
        margin-top: 15px;
        gap: 8px;
    }

    /* .active classı gelince KESİNLİKLE göster */
    .modern-nav ul.active {
        display: flex !important;
    }

    .modern-nav ul li { width: 100%; }
    .modern-nav ul li a { justify-content: center; padding: 14px; }
}