/* STDD Playground — Gate badge styles */
/* Three gate levels with distinct visual treatment */

.gate {
    position: relative;
    margin: 32px 0;
    padding: 24px 28px;
    border-radius: 10px;
    border: 2px solid;
    background: #fff;
    transition: all 0.3s ease;
}

.gate-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    font-size: 18px;
    font-weight: 600;
}

.gate-icon {
    font-size: 24px;
}

/* Gate 1 — scope confirmation */
.gate-1 {
    border-color: #f59e0b;
    background: linear-gradient(135deg, #fffbeb 0%, #fff 100%);
}
.gate-1 .gate-header { color: #92400e; }

/* Gate 2 — design baseline (most critical) */
.gate-2 {
    border-color: #f59e0b;
    background: linear-gradient(135deg, #fef3c7 0%, #fff 100%);
    box-shadow: 0 0 0 4px rgba(245,158,11,0.15);
}
.gate-2 .gate-header { color: #92400e; }

/* Gate 3 — final quality gate */
.gate-3 {
    border-color: #009573;
    background: linear-gradient(135deg, #e6f4f1 0%, #fff 100%);
}
.gate-3 .gate-header { color: #009573; }

/* Passed state */
.gate.passed {
    border-color: #009573;
    background: linear-gradient(135deg, #e6f4f1 0%, #f8f9fb 100%);
}
.gate.passed .gate-header { color: #009573; }
.gate.passed .gate-icon::after {
    content: " ✓";
    color: #009573;
    font-size: 18px;
}

/* Locked state */
.gate.locked {
    border-color: #d1d5db;
    background: #f9fafb;
    opacity: 0.7;
}
.gate.locked .gate-header { color: #9ca3af; }

/* Gate interaction area */
.gate-interact {
    margin-top: 16px;
}

.gate-checklist {
    list-style: none;
    padding: 0;
}

.gate-checklist li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    margin: 6px 0;
    border-radius: 6px;
    border: 1px solid #e5e7eb;
    background: #f9fafb;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 15px;
    color: #374151;
}

.gate-checklist li:hover {
    border-color: #009573;
    background: #e6f4f1;
}

.gate-checklist li.checked {
    border-color: #009573;
    background: #e6f4f1;
    color: #009573;
}

.gate-checklist li.checked::before {
    content: "✓";
    font-weight: 700;
    color: #009573;
}

.gate-btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    background: #009573;
    color: #fff;
}

.gate-btn:hover {
    background: #00b388;
}

.gate-btn:disabled {
    background: #d1d5db;
    color: #9ca3af;
    cursor: not-allowed;
}

/* Gate modal overlay */
.gate-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.gate-modal {
    width: 100%;
    max-width: 600px;
    max-height: 70vh;
    overflow-y: auto;
    background: #fff;
    border-radius: 16px 16px 0 0;
    padding: 32px 28px;
    box-shadow: 0 -4px 24px rgba(0,0,0,0.15);
    transform: translateY(100%);
    animation: slideUp 0.3s ease forwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

@keyframes slideUp {
    from { transform: translateY(100%); }
    to   { transform: translateY(0); }
}

/* Mobile: fixed bottom */
@media (max-width: 768px) {
    .gate {
        margin: 20px 0;
        padding: 16px 18px;
    }
    .gate-modal {
        max-width: 100%;
        border-radius: 16px 16px 0 0;
        padding: 24px 18px;
    }
}

/* Mode selection cards (Gate 2 → 长程/普通模式选择) */
.mode-select-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.mode-card {
    background: #f8f9fb;
    border: 2px solid #e5e7eb;
    border-radius: 10px;
    padding: 24px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
}

.mode-card:hover {
    border-color: #009573;
    background: #e6f4f1;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,149,115,0.12);
}

.mode-card .mode-card-icon {
    display: block;
    font-size: 32px;
    margin-bottom: 10px;
}

.mode-card strong {
    display: block;
    color: #1a1a2e;
    font-size: 16px;
    margin-bottom: 8px;
}

.mode-card p {
    color: #919598;
    font-size: 13px;
    line-height: 1.6;
    margin: 0;
}

@media (max-width: 768px) {
    .mode-select-cards {
        grid-template-columns: 1fr;
    }
}