@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

:root {
    --bg-base: #f0fdfa; /* Teal 50 */
    --bg-gradient-1: #e0e7ff; /* Indigo 100 */
    --bg-gradient-2: #fce7f3; /* Pink 100 */
    
    --glass-bg: rgba(255, 255, 255, 0.75);
    --glass-border: rgba(255, 255, 255, 0.6);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
    --glass-blur: blur(16px);
    
    --primary: #4f46e5;       /* Indigo 600 */
    --primary-hover: #4338ca; /* Indigo 700 */
    
    --text-main: #0f172a;     /* Slate 900 */
    --text-muted: #64748b;    /* Slate 500 */
    --border-color: rgba(148, 163, 184, 0.3); /* Slate 400 */
    
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --dark: #1e293b;
    
    --bg-input: rgba(255, 255, 255, 0.9);
}

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

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    background-color: var(--bg-base);
    background-image: 
        radial-gradient(at 0% 0%, var(--bg-gradient-1) 0px, transparent 50%),
        radial-gradient(at 100% 0%, var(--bg-gradient-2) 0px, transparent 50%),
        radial-gradient(at 100% 100%, #ccfbf1 0px, transparent 50%),
        radial-gradient(at 0% 100%, #e0e7ff 0px, transparent 50%);
    background-attachment: fixed;
}

h1, h2, h3, h4, .logo {
    font-family: 'Outfit', sans-serif;
}

.text-center { text-align: center; }
.text-left { text-align: left; }

/* --- Top Navigation --- */
.top-nav {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 10;
    box-shadow: 0 4px 15px rgba(0,0,0,0.03);
}

.nav-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    gap: 12px;
    background: rgba(241, 245, 249, 0.8);
    padding: 4px;
    border-radius: 12px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 14px;
    padding: 8px 16px;
    border-radius: 8px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.nav-links a.active {
    color: var(--primary);
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

/* User Role & Logout */
.user-role-selector span {
    font-family: 'Outfit', sans-serif;
}

/* --- Views --- */
.view {
    display: none;
    animation: slideUp 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.view.active {
    display: block;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Container & Layout --- */
.container {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
}

/* --- Login Screen --- */
.view.active.login-wrapper {
    display: flex;
}

.login-wrapper {
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.login-header {
    margin-bottom: 30px;
}

.logo-large {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.login-header h2 {
    font-size: 28px;
    color: var(--text-main);
    margin-bottom: 8px;
    font-weight: 700;
}
.login-header p {
    font-size: 15px;
    color: var(--text-muted);
}

.page-header {
    margin-bottom: 35px;
}

.page-header h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.page-header p {
    font-size: 15px;
    color: var(--text-muted);
}

/* --- Form Card (Glassmorphism) --- */
.form-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 40px;
    box-shadow: var(--glass-shadow);
}

.login-card {
    width: 100%;
    max-width: 440px;
}

.form-row {
    display: flex;
    gap: 24px;
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 24px;
    position: relative;
}

.form-group.flex-1 { flex: 1; margin-bottom: 0; }
.form-group.flex-2 { flex: 2; margin-bottom: 0; }

label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 8px;
    letter-spacing: 0.3px;
    text-transform: uppercase;
}

.form-control {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    font-family: inherit;
    font-size: 15px;
    color: var(--text-main);
    background-color: var(--bg-input);
    transition: all 0.3s ease;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
    outline: none;
}

.form-control::placeholder {
    color: #94a3b8; /* slate 400 */
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.15), inset 0 2px 4px rgba(0,0,0,0.02);
    background-color: #fff;
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-size: 16px;
    padding-right: 40px;
}

/* --- Stepper Input --- */
.stepper {
    display: flex;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    height: 50px; 
    background: var(--bg-input);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
}

.stepper-btn {
    background: transparent;
    border: none;
    width: 48px;
    font-size: 20px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stepper-btn:hover { background: rgba(0,0,0,0.03); color: var(--text-main); }

.stepper-input {
    flex: 1;
    border: none;
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    text-align: center;
    font-family: inherit;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-main);
    outline: none;
    background: transparent;
}
.stepper-input::-webkit-outer-spin-button,
.stepper-input::-webkit-inner-spin-button {
  -webkit-appearance: none; margin: 0;
}

/* --- Status Buttons --- */
.status-group {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

.status-btn {
    padding: 14px 12px;
    border: 1.5px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-input);
    color: var(--text-muted);
    font-family: inherit;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.02);
}

.status-btn i { font-size: 18px; transition: transform 0.3s ease; }

.status-btn:hover {
    border-color: #cbd5e1;
    color: var(--text-main);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
}

.status-btn.active {
    transform: scale(1.02);
}
.status-btn.active i {
    transform: scale(1.1);
}

.status-btn.active[data-status="tamamlandi"] {
    background-color: var(--success);
    border-color: var(--success);
    color: white;
    box-shadow: 0 8px 20px rgba(16, 185, 129, 0.25);
}
.status-btn.active[data-status="gelmedi"],
.status-btn.active[data-status="iptal"] {
    background-color: var(--danger);
    border-color: var(--danger);
    color: white;
    box-shadow: 0 8px 20px rgba(239, 68, 68, 0.25);
}
.status-btn.active[data-status="ertelendi"] {
    background-color: var(--warning);
    border-color: var(--warning);
    color: white;
    box-shadow: 0 8px 20px rgba(245, 158, 11, 0.25);
}

/* --- Buttons Row --- */
.form-actions {
    display: flex;
    gap: 16px;
    margin-top: 36px;
}

.btn {
    padding: 16px 28px;
    border-radius: 14px;
    font-family: 'Outfit', sans-serif;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn i { margin-right: 8px; font-size: 16px; }

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #818cf8);
    color: white;
    flex: 2; 
    box-shadow: 0 8px 20px rgba(79, 70, 229, 0.3);
}
.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 25px rgba(79, 70, 229, 0.4);
    background: linear-gradient(135deg, var(--primary-hover), #6366f1);
}

.btn-outline-warning {
    background-color: rgba(245, 158, 11, 0.05);
    border: 2px solid var(--warning);
    color: var(--warning);
    flex: 1; 
}
.btn-outline-warning:hover {
    background-color: var(--warning);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(245, 158, 11, 0.2);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid #cbd5e1;
    color: var(--text-main);
    border-radius: 8px;
    padding: 8px 16px;
}
.btn-outline:hover {
    background-color: var(--text-main);
    color: white;
    border-color: var(--text-main);
}

.btn-delete {
    background-color: rgba(239, 68, 68, 0.05);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--danger);
    border-radius: 8px;
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
}
.btn-delete i { font-size: 13px; margin-right: 4px; }
.btn-delete:hover {
    background-color: var(--danger);
    color: white;
    border-color: var(--danger);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.25);
}

/* --- Attendance Buttons --- */
.btn-attendance {
    background-color: rgba(16, 185, 129, 0.1); /* light success */
    border: 1px solid var(--success);
    color: var(--success);
    border-radius: 20px;
    padding: 6px 14px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.btn-attendance:hover {
    opacity: 0.8;
}
.btn-attendance.absent {
    background-color: var(--danger);
    border-color: var(--danger);
    color: white;
    box-shadow: 0 4px 10px rgba(239, 68, 68, 0.3);
}

/* Generated list of lessons style */
.lesson-record-item {
    margin-bottom: 12px;
    padding: 16px 20px;
    background: var(--glass-bg);
    border: 1px solid rgba(255, 255, 255, 0.8);
    border-radius: 16px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}
.lesson-record-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 4px;
    background: var(--primary);
    opacity: 0.1;
    transition: opacity 0.3s;
}
.lesson-record-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.05);
    background: white;
}
.lesson-record-item:hover::before {
    opacity: 1;
}

@media (max-width: 768px) {
    .container { padding: 0 16px; margin: 20px auto; }
    .form-card { padding: 24px; border-radius: 20px; }
    .login-card { padding: 30px !important; }
    
    .form-row { flex-direction: column; gap: 16px; margin-bottom: 16px; }
    
    .status-group { grid-template-columns: 1fr 1fr; gap: 10px;}
    .status-btn { padding: 12px 6px; font-size: 12px; flex-direction: row; }
    
    .form-actions { flex-direction: column; gap: 12px; margin-top: 24px; }
    .btn { width: 100%; }

    .nav-container { padding: 0 16px; }
    .nav-links { gap: 4px; padding: 4px; }
    .logo { font-size: 18px; }
    .user-role-selector span { display: none; }
    
    .page-header h1 { font-size: 24px; }
}