/* ===================================================================
   NovaSheets — Modern UI Stylesheet
   =================================================================== */

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

:root {
    --clr-bg: #f8fafc;
    --clr-surface: #ffffff;
    --clr-border: #e2e8f0;
    --clr-text: #0f172a;
    --clr-text-muted: #64748b;
    --clr-primary: #3b82f6;
    --clr-primary-hover: #2563eb;
    --clr-primary-light: #dbeafe;
    --clr-success: #10b981;
    --clr-warning: #f59e0b;
    --clr-error: #ef4444;
    --clr-error-bg: #fef2f2;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(0,0,0,0.05), 0 4px 12px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', sans-serif;
    background: var(--clr-bg);
    color: var(--clr-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===================================================================
   HEADER
   =================================================================== */

.site-header {
    background: var(--clr-surface);
    border-bottom: 1px solid var(--clr-border);
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 40px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--clr-text);
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    gap: 28px;
}

.nav-links a {
    color: var(--clr-text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--clr-primary);
}

/* --- User badge --- */
.user-badge {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 12px;
    background: var(--clr-primary-light);
    border-radius: 8px;
    font-size: 0.85rem;
}

.user-email {
    font-weight: 500;
    color: var(--clr-text);
}

/* ===================================================================
   HERO SECTION
   =================================================================== */

.hero {
    background: #f5f5f5;
    color: #1f2937;
    padding: 80px 24px;
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 16px;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.2rem;
    opacity: 0.95;
    max-width: 600px;
    margin: 0 auto 32px;
    line-height: 1.5;
}

.hero-features {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.feature-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    padding: 10px 18px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    color: #1f2937;
}

/* ===================================================================
   LAYOUT
   =================================================================== */

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px;
}

main {
    flex: 1;
    padding: 48px 0;
}

/* --- Links --- */
.link-primary {
    color: var(--clr-primary);
    text-decoration: none;
    font-weight: 500;
}

.link-primary:hover {
    text-decoration: underline;
}

/* --- Login panel --- */
.login-message {
    margin-top: 16px;
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 0.85rem;
    text-align: center;
}

.login-message-success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid var(--clr-success);
}

.login-message-error {
    background: var(--clr-error-bg);
    color: var(--clr-error);
    border: 1px solid var(--clr-error);
}

/* --- Panels --- */
.panel {
    background: var(--clr-surface);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow);
    margin-bottom: 24px;
}

.panel h2 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--clr-text);
}

.panel-error {
    border-color: var(--clr-error);
    background: var(--clr-error-bg);
}

.panel-error h2 { color: var(--clr-error); }
.panel-error p  { color: var(--clr-error); margin-bottom: 16px; }

.hidden { display: none !important; }

/* --- Form sections --- */
.form-section {
    margin-bottom: 24px;
}

.form-section h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--clr-text);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-section label {
    display: block;
    font-size: 0.85rem;
    color: var(--clr-text-muted);
    margin-bottom: 6px;
}

.hint {
    font-size: 0.8rem;
    color: var(--clr-text-muted);
    margin-bottom: 8px !important;
    font-style: italic;
}

/* --- Inputs --- */
input[type="password"],
input[type="text"],
textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--clr-border);
    border-radius: 6px;
    font-size: 0.9rem;
    font-family: inherit;
    background: var(--clr-bg);
    color: var(--clr-text);
    transition: border-color 0.2s;
    outline: none;
}

input[type="password"]:focus,
input[type="text"]:focus,
textarea:focus {
    border-color: var(--clr-primary);
    background: #fff;
}

textarea {
    resize: vertical;
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.82rem;
    line-height: 1.5;
}

input.input-sm {
    width: auto;
    max-width: 160px;
}

/* --- Dropzone --- */
.dropzone {
    border: 2px dashed var(--clr-border);
    border-radius: 8px;
    padding: 32px 20px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
    background: var(--clr-bg);
}

.dropzone:hover,
.dropzone.dragover {
    border-color: var(--clr-primary);
    background: #eef5ff;
}

.dropzone p {
    color: var(--clr-text-muted);
    font-size: 0.9rem;
    margin: 4px 0;
}

.dropzone p.hint {
    font-size: 0.78rem;
}

.file-info {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 8px;
    padding: 8px 12px;
    background: #e8f4fd;
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--clr-text);
}

/* --- Quick-add --- */
.quick-add {
    margin-top: 12px;
    padding: 12px 14px;
    background: var(--clr-bg);
    border-radius: 6px;
    border: 1px solid var(--clr-border);
}

.quick-add h4 {
    font-size: 0.8rem;
    color: var(--clr-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.4px;
    margin-bottom: 8px;
}

.quick-add-row {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}

.quick-add-row input {
    flex: 1;
    min-width: 120px;
    padding: 7px 10px;
    font-size: 0.82rem;
}

.form-row {
    display: flex;
    gap: 8px;
    margin-top: 10px;
}

/* --- Options --- */
.option-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.option-row label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 0;
    font-size: 0.88rem;
    color: var(--clr-text);
}

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--clr-primary);
    cursor: pointer;
}

.option-row .input-sm {
    margin-bottom: 0;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, opacity 0.2s;
    font-family: inherit;
}

.btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--clr-primary);
    color: #fff;
}

.btn-primary:hover:not(:disabled) {
    background: var(--clr-primary-hover);
}

.btn-ghost {
    background: transparent;
    color: var(--clr-primary);
    border: 1px solid var(--clr-border);
}

.btn-ghost:hover:not(:disabled) {
    background: #eef5ff;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.8rem;
}

.btn-full {
    width: 100%;
    padding: 13px;
    font-size: 1rem;
    margin-top: 8px;
}

/* --- Progress steps --- */
.steps {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 24px;
    position: relative;
}

.steps::before {
    content: '';
    position: absolute;
    top: 12px;
    left: 10%;
    right: 10%;
    height: 3px;
    background: var(--clr-border);
    z-index: 0;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    position: relative;
    z-index: 1;
    text-align: center;
}

.step-dot {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--clr-border);
    border: 3px solid var(--clr-surface);
    box-shadow: 0 0 0 3px var(--clr-border);
    transition: all 0.3s;
}

.step.completed .step-dot {
    background: var(--clr-success);
    box-shadow: 0 0 0 3px rgba(16,185,129,0.2);
}

.step.active .step-dot {
    background: var(--clr-primary);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.25);
    animation: pulse 1.5s infinite;
}

.step.failed .step-dot {
    background: var(--clr-error);
    box-shadow: 0 0 0 3px rgba(239,68,68,0.2);
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 3px rgba(59,130,246,0.25); }
    50%      { box-shadow: 0 0 0 6px rgba(59,130,246,0.1);  }
}

.step-label {
    font-size: 0.72rem;
    color: var(--clr-text-muted);
    margin-top: 6px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.step.active .step-label   { color: var(--clr-primary); font-weight: 600; }
.step.completed .step-label { color: var(--clr-success); font-weight: 600; }
.step.failed .step-label    { color: var(--clr-error);   font-weight: 600; }

/* --- Log output --- */
.log-container {
    background: #1e293b;
    border-radius: 8px;
    padding: 14px 16px;
    max-height: 260px;
    overflow-y: auto;
}

#logOutput {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.75rem;
    color: #94a3b8;
    line-height: 1.7;
}

.log-entry {
    padding: 1px 0;
    word-break: break-all;
}

.log-entry.log-success { color: var(--clr-success); }
.log-entry.log-error   { color: var(--clr-error);   }

.note-text {
    font-size: 0.78rem;
    color: var(--clr-text-muted);
    text-align: center;
    margin-top: 16px;
    font-style: italic;
}

/* --- Results --- */
.results-summary {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
}

.stat {
    flex: 1;
    background: var(--clr-bg);
    border-radius: 8px;
    padding: 16px;
    text-align: center;
    border: 1px solid var(--clr-border);
}

.stat-value {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--clr-primary);
}

.stat-label {
    display: block;
    font-size: 0.72rem;
    color: var(--clr-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.4px;
    margin-top: 4px;
}

.results-actions {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

/* --- Results table --- */
.results-table {
    overflow-x: auto;
}

.results-table table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}

.results-table th {
    background: var(--clr-bg);
    text-align: left;
    padding: 10px 12px;
    border-bottom: 2px solid var(--clr-border);
    color: var(--clr-text-muted);
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.4px;
    font-weight: 600;
    white-space: nowrap;
}

.results-table td {
    padding: 9px 12px;
    border-bottom: 1px solid var(--clr-border);
    color: var(--clr-text);
    vertical-align: top;
}

.results-table tr:last-child td {
    border-bottom: none;
}

.results-table tr:hover td {
    background: #f8fafc;
}

/* ===================================================================
   FOOTER
   =================================================================== */

.site-footer {
    background: var(--clr-surface);
    border-top: 1px solid var(--clr-border);
    padding: 60px 0 24px;
    margin-top: 80px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-section h4 {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--clr-text);
    margin-bottom: 16px;
}

.footer-logo {
    margin-bottom: 12px;
}

.footer-tagline {
    font-size: 0.9rem;
    color: var(--clr-text-muted);
    line-height: 1.6;
    max-width: 280px;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: var(--clr-text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--clr-primary);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
    border-top: 1px solid var(--clr-border);
    font-size: 0.85rem;
    color: var(--clr-text-muted);
}

.footer-badges {
    display: flex;
    gap: 12px;
}

.footer-badges .badge {
    padding: 4px 12px;
    background: var(--clr-bg);
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--clr-text-muted);
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .header-left {
        gap: 20px;
    }

    .nav-links {
        display: none;
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

@media (max-width: 600px) {
    main { padding: 32px 0; }
    .hero { padding: 60px 20px; }
    .steps { flex-direction: column; gap: 8px; }
    .steps::before { display: none; }
    .step { flex-direction: row; align-items: center; gap: 10px; }
    .step-label { margin-top: 0; text-align: left; }
    .results-summary { flex-direction: column; }
    .quick-add-row { flex-direction: column; align-items: stretch; }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .feature-badge {
        font-size: 0.8rem;
        padding: 8px 14px;
    }
}