:root {
    --bg-dark: #121212;
    /* Coal/Black */
    --bg-card: #1f221b;
    /* Dark Green tint */
    --accent: #C2B280;
    /* Sand */
    --accent-hover: #e0d5b5;
    --primary: #4B5320;
    /* Army Green */
    --text-primary: #FFFFFF;
    --text-secondary: #aaaaaa;
    --input-bg: #2C2C2C;
    --border: #333;
    --success: #C2B280;
    /* Sand for success too */
    --danger: #8b0000;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Oswald', sans-serif;
    /* Rugged font */
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    background: radial-gradient(circle at center, #252525, #121212);
}

.container {
    width: 100%;
    max-width: 700px;
}

header {
    text-align: center;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--primary);
    padding-bottom: 20px;
}

.logo {
    max-width: 150px;
    height: auto;
    border-radius: 50%;
    /* Optional: if circular logo looks better rounded */
    margin-bottom: 1rem;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

@media (max-width: 480px) {
    .logo {
        max-width: 100px;
    }
}

h1 {
    font-weight: 700;
    letter-spacing: 5px;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 3rem;
    text-transform: uppercase;
}

.subtitle {
    color: var(--accent);
    letter-spacing: 2px;
    font-size: 1rem;
    text-transform: uppercase;
}

nav {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 20px;
}

nav button,
.btn-link {
    background: transparent;
    border: 1px solid var(--text-secondary);
    color: var(--text-secondary);
    padding: 8px 16px;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    text-decoration: none;
    font-size: 0.9rem;
}

nav button:hover,
.btn-link:hover {
    border-color: var(--accent);
    color: var(--accent);
}

nav button.active {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--text-primary);
    font-weight: 700;
}

.card {
    background: var(--bg-card);
    padding: 2.5rem;
    border: 1px solid var(--border);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--accent);
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 2px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 10px;
}

.input-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

input,
select {
    width: 100%;
    padding: 12px;
    background: var(--input-bg);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-size: 1.1rem;
    transition: all 0.3s;
    border-radius: 0;
    /* Square edges for rugged look */
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--accent);
    background: #333;
}

option {
    background-color: var(--bg-card);
    color: var(--text-primary);
}

.selection-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.selection-grid .input-group:last-child {
    grid-column: span 2;
}

.btn-primary {
    width: 100%;
    padding: 15px;
    background: var(--primary);
    color: var(--text-primary);
    border: none;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.3s;
    text-transform: uppercase;
    letter-spacing: 2px;
    border-radius: 0;
}

.btn-primary:hover {
    background: #5d662f;
    /* Lighter Army Green */
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
    padding: 8px 16px;
    cursor: pointer;
    transition: all 0.3s;
    text-transform: uppercase;
    font-weight: 600;
    border-radius: 0;
}

.btn-secondary:hover {
    background: var(--accent);
    color: var(--bg-dark);
}

.btn-danger {
    background: var(--danger);
    color: white;
    border: none;
    padding: 5px 10px;
    cursor: pointer;
    text-transform: uppercase;
    font-size: 0.8rem;
}

.hidden-section,
.hidden {
    display: none;
}

.user-list {
    margin: 1rem 0;
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid var(--border);
    padding: 0;
}

.user-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    border-bottom: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.02);
}

.user-item:last-child {
    border-bottom: none;
}

.user-item label {
    margin: 0;
    color: var(--text-primary);
    cursor: pointer;
    flex-grow: 1;
    margin-left: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.user-pref-summary {
    color: var(--accent);
    font-size: 0.9rem;
    margin-left: 10px;
    font-weight: bold;
}

input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--primary);
    cursor: pointer;
}

textarea {
    width: 100%;
    background: var(--input-bg);
    color: var(--text-primary);
    border: 1px solid var(--border);
    padding: 15px;
    min-height: 200px;
    margin-bottom: 15px;
    font-family: monospace;
    font-size: 1rem;
}

.actions {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border);
}

.toast {
    margin-top: 15px;
    text-align: center;
    color: var(--success);
    opacity: 0;
    transition: opacity 0.3s;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: bold;
}

.toast.show {
    opacity: 1;
}

.full-width {
    width: 100%;
}

/* Admin specific styles */
.admin-section {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border);
}

.list-item {
    display: flex;
    justify-content: space-between;
    padding: 10px;
    background: rgba(0, 0, 0, 0.2);
    margin-bottom: 5px;
    align-items: center;
}

.add-item-form {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-card);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* =========================================
   MOBILE OPTIMIZATION (Max-width: 600px)
   ========================================= */
@media (max-width: 600px) {

    /* 1. Maximize Screen Real Estate */
    body {
        padding: 10px;
        align-items: flex-start;
        /* Allow scrolling from top */
    }

    .container {
        width: 100%;
    }

    .card {
        padding: 1.5rem;
        /* Less padding to give content room */
    }

    /* 2. Typography Adjustments */
    h1 {
        font-size: 2rem;
        /* Smaller title */
        letter-spacing: 3px;
    }

    h2 {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
    }

    /* 3. Stacked Layout for Forms */
    .selection-grid {
        grid-template-columns: 1fr;
        /* Single column stack */
        gap: 0.5rem;
    }

    .selection-grid .input-group:last-child {
        grid-column: span 1;
        /* Reset span */
    }

    /* 4. Touch Targets (Fat Finger Friendly) */
    input,
    select,
    button.btn-primary {
        padding: 14px;
        /* Larger hit area */
        font-size: 16px;
        /* Prevent iOS zoom on focus */
        height: auto;
    }

    /* 5. Navigation Tweaks */
    nav {
        gap: 10px;
        flex-wrap: wrap;
    }

    nav button,
    .btn-link {
        padding: 10px 20px;
        /* Easier to tap */
        flex-grow: 1;
        /* Stretch to fill row */
        text-align: center;
    }

    /* 6. Logo Sizing */
    .logo {
        max-width: 120px;
    }
}