/* ===== VARIABLES ===== */
:root {
    --bg-base: #0d0f08;
    --bg-surface: #151810;
    --bg-card: #1a1e14;
    --bg-card-alt: #1e2318;
    --bg-input: #111409;
    --accent: #b8922a;
    --accent-bright: #d4aa30;
    --accent-dim: #8a6e1e;
    --green: #4a6e2a;
    --green-light: #6a9a3a;
    --red: #a44028;
    --red-light: #c45a3a;
    --orange: #c47a20;
    --text-main: #dcd8c8;
    --text-mid: #a09a82;
    --text-dim: #605a48;
    --border: #282c1e;
    --border-light: #363a28;
}

/* ===== RESET & BASE ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system, 'Segoe UI', Helvetica, sans-serif;
    background: var(--bg-base);
    color: var(--text-main);
    min-height: 100vh;
    line-height: 1.6;
}

/* ===== HEADER ===== */
header {
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    padding: 2rem 1.5rem 0;
    text-align: center;
}

.logo h1 {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.logo .tagline {
    font-size: 0.85rem;
    color: var(--text-dim);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-top: 0.3rem;
}

/* ===== TAB NAV ===== */
.tab-nav {
    display: flex;
    gap: 0;
    justify-content: center;
    margin-top: 1.5rem;
}

.tab-btn {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    background: transparent;
    border: 1px solid var(--border);
    border-bottom: none;
    color: var(--text-dim);
    padding: 0.7rem 1.3rem;
    cursor: pointer;
    transition: all 0.25s;
    position: relative;
}

.tab-btn:first-child { border-radius: 6px 0 0 0; }
.tab-btn:last-child { border-radius: 0 6px 0 0; }

.tab-btn:hover {
    color: var(--text-mid);
    background: rgba(255, 255, 255, 0.03);
}

.tab-btn.active {
    color: var(--accent);
    background: var(--bg-base);
    border-color: var(--border-light);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent);
}

/* ===== MAIN CONTENT ===== */
main {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
}

/* ===== TAB PANELS ===== */
.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeUp 0.3s ease; }

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

/* ===== CARDS ===== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 1.5rem;
}

.card-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 0.5rem;
}

.card-desc {
    color: var(--text-mid);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

/* ===== FORMS ===== */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.25rem;
}

.field label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-mid);
    margin-bottom: 0.4rem;
}

.field input {
    width: 100%;
    padding: 0.7rem 0.9rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 5px;
    color: var(--text-main);
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.field input:focus {
    border-color: var(--accent-dim);
    box-shadow: 0 0 0 3px rgba(184, 146, 42, 0.15);
}

.field input::placeholder { color: var(--text-dim); }

.field .unit {
    font-size: 0.7rem;
    color: var(--text-dim);
    margin-top: 0.3rem;
}

/* ===== BUTTON ===== */
.btn-calc {
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    background: var(--accent);
    color: var(--bg-base);
    border: none;
    border-radius: 5px;
    padding: 0.85rem 2.5rem;
    cursor: pointer;
    transition: all 0.25s;
    margin-top: 1.5rem;
}

.btn-calc:hover {
    background: var(--accent-bright);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(184, 146, 42, 0.25);
}

/* ===== RESULTS ===== */
.results-panel { display: none; margin-top: 1.5rem; }
.results-panel.show { display: block; animation: fadeUp 0.3s ease; }

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem;
}

.result-box {
    background: var(--bg-card-alt);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1.2rem;
    text-align: center;
}

.result-label {
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-dim);
    margin-bottom: 0.3rem;
}

.result-value {
    font-family: 'Courier New', monospace;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent-bright);
    line-height: 1.1;
}

.result-unit {
    font-size: 0.75rem;
    color: var(--text-mid);
    margin-top: 0.2rem;
}

/* ===== ANIMAL RATINGS ===== */
.animal-ratings {
    margin-top: 1.5rem;
}

.animal-ratings h3 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-mid);
    margin-bottom: 0.75rem;
}

.animal-row {
    display: flex;
    align-items: center;
    padding: 0.7rem 0.9rem;
    border-radius: 5px;
    margin-bottom: 0.4rem;
    background: var(--bg-card-alt);
    border: 1px solid var(--border);
    gap: 0.75rem;
}

.animal-icon { font-size: 1.2rem; flex-shrink: 0; }

.animal-name {
    flex: 1;
    font-size: 0.9rem;
    font-weight: 500;
}

.animal-detail {
    font-family: 'Courier New', monospace;
    font-size: 0.7rem;
    color: var(--text-dim);
    text-align: right;
    flex-shrink: 0;
}

.animal-badge {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 0.25rem 0.7rem;
    border-radius: 3px;
    white-space: nowrap;
}

.badge-pass {
    background: rgba(74, 110, 42, 0.25);
    color: var(--green-light);
    border: 1px solid rgba(74, 110, 42, 0.4);
}

.badge-marginal {
    background: rgba(196, 122, 32, 0.2);
    color: var(--orange);
    border: 1px solid rgba(196, 122, 32, 0.35);
}

.badge-fail {
    background: rgba(164, 64, 40, 0.2);
    color: var(--red-light);
    border: 1px solid rgba(164, 64, 40, 0.3);
}

/* ===== REFERENCE TABLE ===== */
.ref-table {
    width: 100%;
    border-collapse: collapse;
}

.ref-table thead th {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-dim);
    text-align: left;
    padding: 0.75rem 0.9rem;
    border-bottom: 1px solid var(--border-light);
}

.ref-table tbody td {
    padding: 0.85rem 0.9rem;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border);
}

.ref-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

/* ===== FAQ ===== */
.faq-item {
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--border);
}

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

.faq-item h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 0.5rem;
}

.faq-item p {
    color: var(--text-mid);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 600px) {
    .tab-nav { flex-wrap: wrap; }
    .tab-btn { flex: 1 1 auto; font-size: 0.7rem; padding: 0.6rem 0.8rem; }
    .form-grid { grid-template-columns: 1fr 1fr; }
    .animal-detail { display: none; }
    .results-grid { grid-template-columns: 1fr; }
}

/* ===== AUTH ===== */
.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.auth-links {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.welcome {
    font-size: 0.8rem;
    color: var(--text-mid);
}

.auth-btn {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-mid);
    text-decoration: none;
    padding: 0.4rem 0.8rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    transition: all 0.2s;
}

.auth-btn:hover {
    color: var(--text-main);
    border-color: var(--border-light);
}

.auth-btn.register {
    background: var(--accent-dim);
    color: var(--bg-base);
    border-color: var(--accent-dim);
}

.auth-btn.register:hover {
    background: var(--accent);
}

.auth-form .field {
    margin-bottom: 1rem;
}

.auth-form input {
    width: 100%;
    padding: 0.7rem 0.9rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 5px;
    color: var(--text-main);
    font-size: 1rem;
    outline: none;
}

.auth-form input:focus {
    border-color: var(--accent-dim);
    box-shadow: 0 0 0 3px rgba(184, 146, 42, 0.15);
}

.field-error {
    color: var(--red-light);
    font-size: 0.75rem;
    margin-top: 0.25rem;
    display: block;
}

.auth-link {
    margin-top: 1.5rem;
    font-size: 0.85rem;
    color: var(--text-mid);
}

.auth-link a {
    color: var(--accent);
    text-decoration: none;
}

.auth-link a:hover {
    text-decoration: underline;
}

.alert {
    padding: 0.75rem 1rem;
    border-radius: 5px;
    margin-bottom: 1rem;
    font-size: 0.85rem;
}

.alert-success {
    background: rgba(74, 110, 42, 0.2);
    color: var(--green-light);
    border: 1px solid rgba(74, 110, 42, 0.3);
}

.alert-error {
    background: rgba(164, 64, 40, 0.2);
    color: var(--red-light);
    border: 1px solid rgba(164, 64, 40, 0.3);
}

/* ===== SUBMIT GRID ===== */
.submit-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.submit-card {
    background: var(--bg-card-alt);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1.5rem 1rem;
    text-align: center;
    text-decoration: none;
    transition: all 0.25s;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.submit-card:hover {
    border-color: var(--accent-dim);
    background: rgba(184, 146, 42, 0.05);
    transform: translateY(-2px);
}

.submit-icon { font-size: 1.8rem; }

.submit-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-main);
}

.submit-desc {
    font-size: 0.7rem;
    color: var(--text-dim);
}

/* ===== BUILDER ===== */
.bow-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.bow-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-card-alt);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1rem 1.25rem;
}

.bow-info h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-main);
}

.bow-specs {
    font-size: 0.8rem;
    color: var(--text-mid);
}

.btn-small {
    font-size: 0.7rem;
    padding: 0.5rem 1rem;
    margin-top: 0;
}

.build-card {
    background: var(--bg-card-alt);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1.25rem;
    margin-bottom: 1.25rem;
}

.build-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 0.75rem;
}

.build-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent);
}

.build-bow {
    font-size: 0.8rem;
    color: var(--text-dim);
}

.build-components {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.build-comp {
    font-size: 0.8rem;
    color: var(--text-mid);
    background: var(--bg-card);
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    border: 1px solid var(--border);
}