/* PromptSnap Web — Style Sheet */
/* 暗色主题 + 玻璃拟态 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ===== CSS Variables ===== */
:root {
    --bg-primary: #06060a;
    --bg-secondary: #0d0d14;
    --bg-card: rgba(255, 255, 255, 0.04);
    --bg-card-hover: rgba(255, 255, 255, 0.07);
    --bg-glass: rgba(255, 255, 255, 0.06);
    --bg-modal: rgba(6, 6, 10, 0.85);

    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    --border-focus: rgba(99, 102, 241, 0.5);

    --text-primary: #e8e8ed;
    --text-secondary: #8b8b9e;
    --text-tertiary: #55556a;
    --text-accent: #a78bfa;

    --accent: #6366f1;
    --accent-hover: #818cf8;
    --accent-glow: rgba(99, 102, 241, 0.25);
    --accent-gradient: linear-gradient(135deg, #6366f1, #8b5cf6, #a78bfa);

    --success: #34d399;
    --error: #f87171;
    --warning: #fbbf24;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.3), 0 0 1px rgba(255, 255, 255, 0.05);
    --shadow-card-hover: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 1px rgba(255, 255, 255, 0.1);
    --shadow-modal: 0 24px 80px rgba(0, 0, 0, 0.6);

    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}

/* Background gradient effect */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at 20% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 80%, rgba(139, 92, 246, 0.06) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* ===== Layout ===== */
.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

/* ===== Header ===== */
.app-header {
    padding: 32px 0 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--accent-gradient);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    box-shadow: 0 0 20px var(--accent-glow);
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.header-actions {
    display: flex;
    gap: 8px;
    align-items: center;
}

.btn-ghost {
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn-ghost:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
    border-color: var(--border-hover);
}

/* ===== Search Bar ===== */
.search-wrapper {
    position: relative;
}

.search-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
    pointer-events: none;
    transition: color var(--transition-fast);
}

.search-input {
    width: 100%;
    padding: 14px 16px 14px 44px;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 15px;
    font-family: inherit;
    outline: none;
    transition: all var(--transition-normal);
    backdrop-filter: blur(8px);
}

.search-input::placeholder {
    color: var(--text-tertiary);
}

.search-input:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--accent-glow);
    background: rgba(255, 255, 255, 0.08);
}

.search-input:focus ~ .search-icon {
    color: var(--accent);
}

.search-shortcut {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
    font-size: 12px;
    padding: 3px 8px;
    border: 1px solid var(--border-subtle);
    border-radius: 4px;
    pointer-events: none;
    font-family: inherit;
}

/* ===== Stats Bar ===== */
.stats-bar {
    display: flex;
    gap: 4px;
    align-items: center;
    font-size: 13px;
    color: var(--text-tertiary);
    padding: 0 4px;
}

.stat-divider {
    margin: 0 4px;
}

/* ===== Tags Bar ===== */
.tags-bar {
    display: flex;
    gap: 8px;
    padding: 4px 0 16px;
    overflow-x: auto;
    white-space: nowrap;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.tags-bar::-webkit-scrollbar {
    display: none;
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 16px;
    border-radius: 100px;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    font-size: 13px;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.tag:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
    border-color: var(--border-hover);
}

.tag.active {
    background: rgba(99, 102, 241, 0.15);
    color: var(--accent-hover);
    border-color: rgba(99, 102, 241, 0.3);
    font-weight: 500;
}

.tag-count {
    font-size: 11px;
    opacity: 0.6;
}

/* ===== Card Grid ===== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 16px;
    padding-bottom: 60px;
}

/* ===== Card ===== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 20px;
    transition: all var(--transition-normal);
    cursor: default;
    backdrop-filter: blur(12px);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-2px);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
    cursor: pointer;
}

.card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
    flex: 1;
}

.card-category {
    font-size: 11px;
    padding: 3px 10px;
    border-radius: 100px;
    background: rgba(167, 139, 250, 0.12);
    color: var(--text-accent);
    font-weight: 500;
    white-space: nowrap;
    flex-shrink: 0;
}

.card-preview {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 80px;
    overflow: hidden;
    cursor: pointer;
    position: relative;
    transition: max-height var(--transition-slow);
}

.card-preview::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 32px;
    background: linear-gradient(transparent, rgba(13, 13, 20, 0.9));
    pointer-events: none;
    transition: opacity var(--transition-normal);
}

.card-preview.expanded {
    max-height: none;
    overflow: visible;
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    font-size: 12px;
    background: rgba(0, 0, 0, 0.2);
    padding: 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
}

.card-preview.expanded::after {
    display: none;
}

.card-expand-hint {
    font-size: 12px;
    color: var(--text-tertiary);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.card-expand-hint:hover {
    color: var(--accent);
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 8px;
    border-top: 1px solid var(--border-subtle);
}

.card-meta {
    display: flex;
    gap: 10px;
    align-items: center;
}

.meta-item {
    font-size: 12px;
    color: var(--text-tertiary);
}

.var-badge {
    color: var(--warning);
}

.card-actions {
    display: flex;
    gap: 8px;
}

.btn-copy {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 12px;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-copy:hover {
    background: rgba(99, 102, 241, 0.15);
    border-color: rgba(99, 102, 241, 0.3);
    color: var(--accent-hover);
    box-shadow: 0 0 12px var(--accent-glow);
}

.btn-copy:active {
    transform: scale(0.96);
}

/* ===== Modal ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg-modal);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.visible {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: 32px;
    width: 90%;
    max-width: 520px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-modal);
    transform: translateY(20px) scale(0.95);
    transition: transform var(--transition-slow);
}

.modal-overlay.visible .modal-content {
    transform: translateY(0) scale(1);
}

.modal-header {
    margin-bottom: 24px;
}

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

.modal-header p {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-top: 4px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid var(--border-subtle);
}

.btn-modal-cancel {
    padding: 10px 20px;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 14px;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-modal-cancel:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.btn-modal-confirm {
    padding: 10px 24px;
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-size: 14px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: 0 0 16px var(--accent-glow);
}

.btn-modal-confirm:hover {
    box-shadow: 0 0 24px rgba(99, 102, 241, 0.4);
    transform: translateY(-1px);
}

/* ===== Variable Form ===== */
.var-field {
    margin-bottom: 16px;
}

.var-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.var-input {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    outline: none;
    transition: all var(--transition-fast);
    resize: vertical;
}

.var-input:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

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

.var-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='%238b8b9e'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
    cursor: pointer;
}

.var-select option {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.var-empty-msg {
    font-size: 14px;
    color: var(--text-secondary);
    text-align: center;
    padding: 16px 0;
}

/* ===== Toast ===== */
.toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    z-index: 2000;
    opacity: 0;
    transition: all var(--transition-normal);
    backdrop-filter: blur(12px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.toast.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast-success {
    background: rgba(52, 211, 153, 0.15);
    border: 1px solid rgba(52, 211, 153, 0.3);
    color: var(--success);
}

.toast-error {
    background: rgba(248, 113, 113, 0.15);
    border: 1px solid rgba(248, 113, 113, 0.3);
    color: var(--error);
}

/* ===== Drop Overlay ===== */
.drop-overlay {
    position: fixed;
    inset: 0;
    background: rgba(6, 6, 10, 0.9);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.drop-overlay.visible {
    opacity: 1;
    visibility: visible;
}

.drop-content {
    text-align: center;
    color: var(--text-primary);
}

.drop-icon {
    font-size: 64px;
    margin-bottom: 16px;
    animation: bounce 1.5s ease infinite;
}

.drop-text {
    font-size: 20px;
    font-weight: 500;
}

.drop-hint {
    font-size: 14px;
    color: var(--text-tertiary);
    margin-top: 8px;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

/* ===== Empty State ===== */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 80px 20px;
}

.empty-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.empty-title {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.empty-desc {
    font-size: 14px;
    color: var(--text-tertiary);
    line-height: 1.8;
}

/* ===== Footer ===== */
.app-footer {
    text-align: center;
    padding: 40px 0;
    font-size: 12px;
    color: var(--text-tertiary);
    border-top: 1px solid var(--border-subtle);
    margin-top: 20px;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .app-container {
        padding: 0 16px;
    }

    .app-header {
        padding: 20px 0 16px;
    }

    .logo-text {
        font-size: 18px;
    }

    .card-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .search-shortcut {
        display: none;
    }

    .header-actions .btn-text {
        display: none;
    }

    .stats-bar {
        font-size: 12px;
    }

    .modal-content {
        width: 95%;
        padding: 24px;
        margin: 0 12px;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .card-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-subtle);
    border-radius: 3px;
}

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

/* ===== Selection ===== */
::selection {
    background: rgba(99, 102, 241, 0.3);
    color: var(--text-primary);
}