/* TAB Bremen - Master Stylesheet 
   Palette: Forest Green (#27ae60), Golden Yellow (#f1c40f), Cream (#FFFDD0)
*/

:root {
    --primary-green: #27ae60;
    --deep-green: #1e8449;
    --saffron-yellow: #f1c40f;
    --cream-bg: #FFFDD0;
    --white: #ffffff;
    --text-dark: #2c3e50;
    --error-red: #e74c3c;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

/* --- Global Reset --- */
* {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--cream-bg);
    color: var(--text-dark);
    line-height: 1.6;
}

/* --- Header & Branding --- */
header {
    background-color: var(--primary-green);
    color: var(--saffron-yellow);
    padding: 30px 20px;
    text-align: center;
    border-bottom: 8px solid var(--saffron-yellow);
}

.logo-img {
    height: 100px;
    width: auto;
    border-radius: 12px;
    margin-bottom: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

/* --- Navigation (Sticky) --- */
nav {
    background: var(--saffron-yellow);
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

nav a {
    padding: 15px 20px;
    text-decoration: none;
    color: var(--primary-green);
    font-weight: 900;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
    transition: 0.3s;
}

nav a:hover {
    background-color: var(--primary-green);
    color: var(--saffron-yellow);
}

/* --- Layout Containers --- */
.container {
    max-width: 1000px;
    margin: 40px auto;
    padding: 0 20px;
}

.card {
    background: var(--white);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow);
    border-top: 12px solid var(--primary-green);
    margin-bottom: 30px;
}

/* --- Typography --- */
h1, h2, h3 {
    margin-top: 0;
}

h2 {
    color: var(--primary-green);
    font-size: 1.8rem;
    border-left: 6px solid var(--saffron-yellow);
    padding-left: 15px;
    margin-bottom: 20px;
}

/* --- Buttons (Bold & Thick) --- */
.back-btn, .btn-submit {
    display: inline-block;
    padding: 15px 35px;
    background-color: var(--saffron-yellow);
    color: var(--primary-green);
    text-decoration: none;
    border-radius: 10px;
    font-weight: 900;
    font-size: 1.1rem;
    border: 4px solid var(--primary-green);
    text-transform: uppercase;
    transition: 0.3s ease;
    cursor: pointer;
    text-align: center;
}

.back-btn:hover, .btn-submit:hover {
    background-color: var(--primary-green);
    color: var(--saffron-yellow);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(39, 174, 96, 0.3);
}

/* --- Forms (Registration) --- */
.section-title {
    display: flex;
    align-items: center;
    background: var(--cream-bg);
    padding: 10px 15px;
    border-radius: 8px;
    margin: 30px 0 20px 0;
    color: var(--primary-green);
    font-weight: bold;
    border-left: 6px solid var(--saffron-yellow);
}

.grid-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.input-group {
    display: flex;
    flex-direction: column;
}

label {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: #444;
}

input, select {
    padding: 12px;
    border: 1.5px solid #eee;
    border-radius: 8px;
    font-size: 1rem;
    width: 100%;
}

input:focus {
    outline: none;
    border-color: var(--primary-green);
}

.option-box {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 12px;
    background: #fafafa;
    padding: 15px;
    border-radius: 10px;
}

/* --- Tables (Schedule) --- */
.schedule-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    background: var(--white);
}

.schedule-table th {
    background: var(--primary-green);
    color: var(--saffron-yellow);
    padding: 15px;
    text-align: left;
}

.schedule-table td {
    padding: 15px;
    border-bottom: 1px solid #eee;
}

.time-slot {
    font-weight: bold;
    color: var(--primary-green);
}

/* --- Footer --- */
footer {
    background: #1a1a1a;
    color: #ecf0f1;
    text-align: center;
    padding: 40px 20px;
    margin-top: 60px;
}

/* --- Mobile Responsiveness --- */
@media (max-width: 768px) {
    .logo-img {
        height: 70px;
    }

    header h1 {
        font-size: 1.4rem;
    }

    nav a {
        padding: 10px 15px;
        font-size: 0.8rem;
        flex: 1 0 45%;
        text-align: center;
    }

    .container {
        padding: 0 15px;
        margin-top: 20px;
    }

    .card {
        padding: 25px 15px;
    }

    h2 {
        font-size: 1.4rem;
    }

    .back-btn {
        width: 100%;
        font-size: 1rem;
    }
}