:root {
    --bg-color: #FAFAFA;
    --fg-color: #0F172A;
    --muted-bg: #F1F5F9;
    --muted-fg: #64748B;
    --accent: #0052FF;
    --accent-sec: #4D7CFF;
    --card-bg: #FFFFFF;
    --border-color: #E2E8F0;
    --success: #10B981;
    --font-display: "Georgia", serif;
    /* Fallback for Calistoga */
    --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
    /* Inter fallback */
    --font-mono: "Courier New", monospace;
    /* JetBrains Mono fallback */
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    color: var(--fg-color);
    line-height: 1.6;
}

/* Utilities */
.container {
    max-width: 100%;
    margin: 0 auto;
    padding: 0 2rem;
}

.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.grid {
    display: grid;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.justify-center {
    justify-content: center;
}

.gap-2 {
    gap: 0.5rem;
}

.gap-4 {
    gap: 1rem;
}

.gap-6 {
    gap: 1.5rem;
}

.mb-2 {
    margin-bottom: 0.5rem;
}

.mb-4 {
    margin-bottom: 1rem;
}

.mb-6 {
    margin-bottom: 1.5rem;
}

.mb-8 {
    margin-bottom: 2rem;
}

.mt-4 {
    margin-top: 1rem;
}

.p-6 {
    padding: 1.5rem;
}

.p-10 {
    padding: 2.5rem;
}

.w-full {
    width: 100%;
}

.hidden {
    display: none;
}

/* Typography */
h1,
h2,
h3 {
    font-family: var(--font-display);
    font-weight: 700;
}

.text-gradient {
    background: linear-gradient(to right, var(--accent), var(--accent-sec));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.text-mono {
    font-family: var(--font-mono);
}

.text-sm {
    font-size: 0.875rem;
}

.text-xs {
    font-size: 0.75rem;
}

.text-muted {
    color: var(--muted-fg);
}

.text-center {
    text-align: center;
}

.font-bold {
    font-weight: 700;
}

/* Components */
.header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    font-size: 1rem;
    white-space: nowrap;
    /* Prevent text wrapping */
}

.btn-primary {
    background: linear-gradient(to right, var(--accent), var(--accent-sec));
    color: white;
    box-shadow: 0 4px 6px rgba(0, 82, 255, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 12px rgba(0, 82, 255, 0.35);
}

.btn-primary:active {
    transform: scale(0.98);
}

.btn-primary:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--fg-color);
}

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

/* Upload Area */
.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: 1.5rem;
    padding: 4rem 2rem;
    text-align: center;
    background: var(--bg-color);
    transition: all 0.3s;
    cursor: pointer;
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--accent);
    background: rgba(0, 82, 255, 0.03);
    transform: scale(1.01);
}

/* Progress Bar */
.progress-container {
    width: 100%;
    background-color: var(--muted-bg);
    border-radius: 9999px;
    height: 0.5rem;
    overflow: hidden;
    margin-top: 0.5rem;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(to right, var(--accent), var(--accent-sec));
    width: 0%;
    transition: width 0.3s ease;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 1rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
    overflow-x: auto;
}

.tab {
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    color: var(--muted-fg);
    font-weight: 500;
    white-space: nowrap;
    transition: all 0.2s;
}

.tab:hover {
    color: var(--fg-color);
}

.tab.active {
    border-bottom-color: var(--accent);
    color: var(--accent);
}

/* Table */
.table-container {
    overflow-x: auto;
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
    background: white;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

th,
td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    min-width: 150px;
    /* Prevent truncation */
    white-space: nowrap;
    /* Keep single line */
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 300px;
}

th {
    background: var(--muted-bg);
    font-weight: 600;
    color: var(--fg-color);
    white-space: nowrap;
}

td {
    color: var(--muted-fg);
}

td input {
    width: 100%;
    border: none;
    background: transparent;
    font-family: inherit;
    color: inherit;
    padding: 0.25rem;
    text-overflow: ellipsis;
}

td input:focus {
    outline: 2px solid var(--accent);
    border-radius: 0.25rem;
    background: white;
    color: var(--fg-color);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 1rem 1.5rem;
    background: var(--fg-color);
    color: white;
    border-radius: 0.75rem;
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    z-index: 100;
    animation: slideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    transition: all 0.3s;
}

.toast-success {
    background: var(--success);
}

.toast-error {
    background: #EF4444;
}

@keyframes slideIn {
    from {
        transform: translateY(100%);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}