/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    line-height: 1.25;
    border: 1px solid transparent;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
    background: transparent;
    color: var(--slate-700);
}

.btn:focus-visible {
    outline: 2px solid var(--ring);
    outline-offset: 2px;
}

.btn-primary {
    background: #0F172A;
    color: #FFFFFF;
    border-color: #0F172A;
}

.btn-primary:hover {
    background: #334155;
    border-color: #334155;
    color: #FFFFFF;
}

.btn-secondary {
    background: var(--secondary);
    color: var(--secondary-foreground);
    border-color: var(--border);
}

.btn-secondary:hover {
    background: var(--slate-200);
}

.btn-danger {
    background: #EF4444;
    color: #FFFFFF;
    border-color: #EF4444;
}

.btn-danger:hover {
    background: #DC2626;
    border-color: #DC2626;
    color: #FFFFFF;
}

.btn-black {
    background: #0F172A;
    color: #FFFFFF;
    border-color: #0F172A;
}

.btn-black:hover {
    background: #334155;
    border-color: #334155;
}

.btn-white {
    background: #FFFFFF;
    color: #0F172A;
    border-color: #E2E8F0;
}

.btn-white:hover {
    background: #F8FAFC;
    border-color: #CBD5E1;
}

.btn-outline {
    background: #FFFFFF;
    color: #0F172A;
    border-color: #E2E8F0;
}

.btn-outline:hover {
    background: #F1F5F9;
    border-color: #E2E8F0;
    color: #0F172A;
}

.btn-subtle {
    background: #F1F5F9;
    color: #0F172A;
    border-color: transparent;
}

.btn-subtle:hover {
    background: #E2E8F0;
    color: #0F172A;
}

.btn-ghost {
    background: transparent;
    color: #0F172A;
    border-color: transparent;
}

.btn-ghost:hover {
    background: #F1F5F9;
    color: #0F172A;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

.btn-lg {
    padding: 10px 20px;
    font-size: 15px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ============================================
   Form Elements
   ============================================ */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--slate-700);
    margin-bottom: 6px;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 8px 12px;
    font-family: inherit;
    font-size: 14px;
    color: var(--foreground);
    background: var(--background);
    border: 1px solid var(--input);
    border-radius: var(--radius);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
    outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--slate-400);
}

.form-group input:focus,
.form-group input[type="password"]:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--slate-400);
    box-shadow: 0 0 0 2px rgba(15, 23, 42, 0.08);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.input-with-toggle {
    position: relative;
}
.input-with-toggle input {
    padding-right: 36px;
}
.input-toggle-btn {
    position: absolute;
    right: 6px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    padding: 4px;
    cursor: pointer;
    color: var(--slate-400);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
}
.input-toggle-btn:hover {
    color: var(--slate-600);
    background: var(--slate-100);
}

/* ============================================
   Modal
   ============================================ */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}

.modal {
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 480px;
    animation: modal-in 0.2s ease-out;
}

@keyframes modal-in {
    from { opacity: 0; transform: scale(0.96) translateY(8px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 20px 0;
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--slate-900);
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: var(--slate-500);
    font-size: 22px;
    cursor: pointer;
    border-radius: var(--radius);
    transition: background 0.15s;
}

.modal-close:hover {
    background: var(--slate-100);
    color: var(--slate-900);
}

.modal-body {
    padding: 16px 20px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 8px;
    padding: 0 20px 20px;
}

.style-upload-progress {
    flex: 1;
    font-size: 12px;
    color: var(--muted-foreground);
}

/* ============================================
   Landing Page (index.html)
   ============================================ */
.landing-page {
    background: var(--muted);
}

.landing-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 48px 24px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.landing-header {
    text-align: center;
    margin-bottom: 48px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.brand-icon {
    flex-shrink: 0;
}

.brand-title {
    font-size: 32px;
    font-weight: 800;
    color: var(--slate-900);
    letter-spacing: -0.02em;
}

.brand-subtitle {
    font-size: 16px;
    color: var(--slate-500);
    font-weight: 400;
}

.landing-main {
    flex: 1;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.section-header h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--slate-900);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.project-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--slate-300);
    transform: translateY(-1px);
}

.project-card.selected {
    border-color: var(--slate-900);
    box-shadow: 0 0 0 1px var(--slate-900);
    transform: translateY(-1px);
}

.project-card.project-card-add {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 20px;
    border-style: dashed;
}

.project-card.project-card-add .char-card-add-body {
    gap: 0;
}

.char-card.char-card-add {
    padding: 20px;
    gap: 0;
}

.char-card-add-body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    width: 100%;
}

.char-card.char-card-add .char-card-add-body {
    gap: 0;
}

.project-card-enter {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 13px;
    font-weight: 500;
    color: #fff;
    background: #0f172a;
    padding: 6px 12px;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: all 0.15s;
}

.project-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-top: auto;
}

.project-card-time {
    font-size: 12px;
    color: var(--slate-400);
    white-space: nowrap;
    flex-shrink: 0;
}

.project-card-enter:hover {
    background: #334155;
    color: #fff;
}

html.dark .project-card-enter {
    background: #f1f5f9;
    color: #0f172a;
}

html.dark .project-card-enter:hover {
    background: #cbd5e1;
    color: #0f172a;
}

.project-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 20px;
}

.project-card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--slate-900);
    line-height: 1.4;
    word-break: break-word;
}

.project-card-menu {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: var(--slate-400);
    border-radius: var(--radius);
    cursor: pointer;
    opacity: 1;
    transition: background 0.15s;
}

.project-card-menu:hover {
    background: var(--slate-100);
    color: var(--slate-700);
}

.project-card-desc {
    font-size: 14px;
    color: var(--slate-500);
    line-height: 1.5;
    margin-top: 0;
    margin-bottom: 20px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.project-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    color: var(--slate-400);
}

.project-card-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.project-card-tag {
    padding: 2px 8px;
    background: var(--slate-100);
    border-radius: 999px;
    font-size: 12px;
    color: var(--slate-600);
    font-weight: 500;
}

.empty-state {
    text-align: center;
    padding: 20px;
    background: var(--card);
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    max-width: 320px;
}

.empty-icon {
    margin-bottom: 12px;
}

.empty-icon svg {
    width: 32px;
    height: 32px;
}

.empty-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--slate-700);
    margin-bottom: 4px;
}

.empty-desc {
    font-size: 13px;
    color: var(--slate-400);
    margin-top: 8px;
}

.empty-btn-primary {
    font-family: inherit;
    font-size: 15px;
    font-weight: 600;
    color: var(--primary-foreground);
    background: var(--primary);
    border: none;
    border-radius: var(--radius);
    padding: 8px 20px;
    cursor: pointer;
    transition: all 0.15s;
}

.empty-btn-primary:hover {
    background: var(--accent);
    color: var(--accent-foreground);
}

.landing-footer {
    text-align: center;
    padding-top: 32px;
    font-size: 13px;
    color: var(--slate-400);
}

.footer-sep {
    margin: 0 6px;
}

/* 项目卡片下拉菜单 */
.dropdown-menu {
    position: absolute;
    right: 12px;
    top: 44px;
    background: var(--popover);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    min-width: 160px;
    z-index: 100;
    padding: 4px;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 8px 12px;
    font-size: 14px;
    color: var(--slate-700);
    background: transparent;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-align: left;
    font-family: inherit;
}

.dropdown-item:hover {
    background: var(--slate-100);
}

.dropdown-item.danger {
    color: #dc2626;
}

.dropdown-item.danger:hover {
    background: #fef2f2;
}