/* ══════════════════════════════════════════════
   NIELIT Student Image Resizer — Stylesheet
   Clean, professional, government/institutional style
   ══════════════════════════════════════════════ */

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

:root {
    --primary: #1a237e;
    --primary-light: #3949ab;
    --primary-lighter: #5c6bc0;
    --primary-bg: #e8eaf6;
    --primary-bg-hover: #c5cae9;
    --accent: #0d47a1;
    --success: #2e7d32;
    --success-bg: #e8f5e9;
    --success-border: #a5d6a7;
    --error: #c62828;
    --error-bg: #ffebee;
    --error-border: #ef9a9a;
    --warning: #e65100;
    --warning-bg: #fff3e0;
    --warning-border: #ffcc80;
    --text: #212121;
    --text-secondary: #616161;
    --text-muted: #9e9e9e;
    --bg: #f5f6fa;
    --bg-card: #ffffff;
    --border: #e0e0e0;
    --border-hover: #bdbdbd;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --transition: 0.2s ease;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 1.25rem;
    width: 100%;
}

/* ── Skip Link ── */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary);
    color: #fff;
    padding: 0.5rem 1rem;
    z-index: 1000;
    transition: top var(--transition);
    text-decoration: none;
    border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus {
    top: 0;
}

/* ── Header ── */
.header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: #fff;
    padding: 1.5rem 0;
    box-shadow: var(--shadow-md);
    position: relative;
    z-index: 10;
}

.header-content {
    display: flex;
    align-items: center;
    gap: 1rem;
}

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

.header-title {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.header-subtitle {
    font-size: 0.9rem;
    opacity: 0.85;
    font-weight: 400;
    margin-top: 0.15rem;
}

/* ── Tabs Navigation ── */
.tabs-nav {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 9;
    box-shadow: var(--shadow-sm);
}

.tabs-wrapper {
    display: flex;
    gap: 0;
}

.tab-btn {
    flex: 1;
    max-width: 260px;
    background: none;
    border: none;
    padding: 1rem 1.5rem;
    font-family: var(--font);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
    border-bottom: 3px solid transparent;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
}

.tab-btn:hover {
    color: var(--primary);
    background: var(--primary-bg);
}

.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 600;
}

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

.tab-icon {
    font-size: 1.1rem;
}

/* ── Main Content ── */
.main {
    flex: 1;
    padding: 2rem 0;
}

.tab-panel[hidden] {
    display: none;
}

/* ── Cards Grid ── */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

/* ── Card ── */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    transition: box-shadow var(--transition), border-color var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--border-hover);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

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

.card-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary);
}

/* ── Specs ── */
.card-specs {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-bottom: 1rem;
    padding: 0.75rem;
    background: var(--primary-bg);
    border-radius: var(--radius-sm);
}

.spec {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
}

.spec-label {
    color: var(--text-secondary);
    font-weight: 500;
}

.spec-value {
    font-weight: 600;
    color: var(--primary);
    font-variant-numeric: tabular-nums;
}

/* ── Instructions ── */
.card-instructions {
    margin-bottom: 1.25rem;
}

.instruction {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.35rem;
    display: flex;
    gap: 0.4rem;
    align-items: flex-start;
    line-height: 1.4;
}

.instruction-icon {
    flex-shrink: 0;
    font-size: 0.7rem;
    margin-top: 2px;
}

/* ── Dropzone ── */
.dropzone {
    border: 2px dashed var(--border);
    border-radius: var(--radius-md);
    padding: 2rem 1rem;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
    position: relative;
    margin-top: auto;
}

.dropzone:hover,
.dropzone:focus-visible {
    border-color: var(--primary-lighter);
    background: var(--primary-bg);
}

.dropzone.drag-over {
    border-color: var(--primary);
    background: var(--primary-bg);
    box-shadow: inset 0 0 0 2px var(--primary-bg-hover);
}

.dropzone:focus-visible {
    outline: 2px solid var(--primary-lighter);
    outline-offset: 2px;
}

.dropzone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.dropzone-icon,
.dropzone-icon-sm {
    opacity: 0.6;
}

.dropzone-text {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.dropzone-or {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.dropzone-hint,
.dropzone-hint-sm {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.file-input {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

/* Compact dropzone for All Docs mode */
.dropzone-compact {
    padding: 1.25rem 1rem;
}

.dropzone-text-sm {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* File selected state */
.dropzone.has-file {
    border-color: var(--success);
    background: var(--success-bg);
    border-style: solid;
}

.dropzone.has-file .dropzone-text,
.dropzone.has-file .dropzone-text-sm {
    color: var(--success);
}

.dropzone.has-error {
    border-color: var(--error);
    background: var(--error-bg);
    border-style: solid;
}

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.25rem;
    font-family: var(--font);
    font-size: 0.9rem;
    font-weight: 600;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    line-height: 1.4;
    white-space: nowrap;
}

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

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

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-light);
    border-color: var(--primary-light);
}

.btn-success {
    background: var(--success);
    color: #fff;
    border-color: var(--success);
}

.btn-success:hover:not(:disabled) {
    background: #388e3c;
    border-color: #388e3c;
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary);
}

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

.btn-sm {
    padding: 0.4rem 0.75rem;
    font-size: 0.8rem;
}

.btn-lg {
    padding: 0.85rem 2rem;
    font-size: 1rem;
}

.btn-select-file {
    position: relative;
    z-index: 2;
    pointer-events: none;
}

.btn-icon {
    font-size: 1.1em;
}

/* ── Result Area ── */
.result-area {
    margin-top: 1.25rem;
}

.result-area[hidden] {
    display: none;
}

.result-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.result-preview {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 1.25rem;
    padding: 1rem;
    background: #fafafa;
    border-bottom: 1px solid var(--border);
}

.result-image {
    width: 132px;
    height: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: #fff;
    image-rendering: auto;
}

.result-details {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    font-size: 0.85rem;
}

.result-title {
    font-weight: 700;
    font-size: 0.95rem;
    margin-bottom: 0.25rem;
}

.result-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.result-label {
    color: var(--text-secondary);
    min-width: 70px;
}

.result-value {
    font-weight: 600;
}

/* Status badges */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.25rem 0.6rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.status-success {
    background: var(--success-bg);
    color: var(--success);
    border: 1px solid var(--success-border);
}

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

.status-processing {
    background: var(--warning-bg);
    color: var(--warning);
    border: 1px solid var(--warning-border);
}

/* Validation checks */
.validation-checks {
    padding: 0.75rem 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.check-item {
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.check-pass {
    color: var(--success);
}

.check-fail {
    color: var(--error);
}

/* Result actions */
.result-actions {
    display: flex;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--border);
    background: #fafafa;
}

/* ── All Documents Mode ── */
.all-docs-header {
    text-align: center;
    margin-bottom: 2rem;
}

.all-docs-header h2 {
    font-size: 1.3rem;
    color: var(--primary);
    margin-bottom: 0.25rem;
}

.all-docs-header p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.all-docs-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.all-doc-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    box-shadow: var(--shadow-sm);
}

.all-doc-header {
    margin-bottom: 1rem;
}

.all-doc-header h3 {
    font-size: 1rem;
    color: var(--primary);
    font-weight: 700;
}

.all-doc-specs {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.all-doc-status {
    margin-top: 0.75rem;
    font-size: 0.85rem;
}

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

.status-ready {
    color: var(--success);
    font-weight: 600;
}

.status-fail-text {
    color: var(--error);
    font-weight: 600;
}

.all-doc-result {
    margin-top: 0.75rem;
}

.all-doc-result[hidden] {
    display: none;
}

.all-doc-result-card {
    background: var(--success-bg);
    border: 1px solid var(--success-border);
    border-radius: var(--radius-sm);
    padding: 0.75rem;
}

.all-doc-result-card.error {
    background: var(--error-bg);
    border-color: var(--error-border);
}

.all-doc-checks {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    font-size: 0.8rem;
}

/* Actions */
.all-docs-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

/* Progress bar */
.progress-container {
    max-width: 500px;
    margin: 0 auto 2rem;
    text-align: center;
}

.progress-container[hidden] {
    display: none;
}

.progress-bar {
    height: 8px;
    background: var(--border);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-lighter) 100%);
    border-radius: 4px;
    transition: width 0.4s ease;
}

.progress-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ── Modal ── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    padding: 1rem;
    backdrop-filter: blur(3px);
}

.modal-overlay[hidden] {
    display: none;
}

.modal {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 640px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border);
}

.modal-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background var(--transition);
}

.modal-close:hover {
    background: var(--primary-bg);
}

.modal-body {
    padding: 1.25rem;
    overflow-y: auto;
    flex: 1;
}

.crop-container {
    max-height: 50vh;
    overflow: hidden;
    background: #e0e0e0;
    border-radius: var(--radius-sm);
}

.crop-container img {
    display: block;
    max-width: 100%;
}

.crop-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    border-top: 1px solid var(--border);
}

/* ── Footer ── */
.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    padding: 1.25rem 0;
    margin-top: auto;
}

.privacy-notice {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    font-size: 0.82rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    justify-content: center;
}

.privacy-icon {
    flex-shrink: 0;
    font-size: 1rem;
}

.footer-version {
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* ── Loading Spinner ── */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2.5px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.processing-indicator {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--warning-bg);
    border: 1px solid var(--warning-border);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    color: var(--warning);
    margin-top: 1rem;
}

/* ── Error Display ── */
.error-message {
    background: var(--error-bg);
    border: 1px solid var(--error-border);
    border-radius: var(--radius-md);
    padding: 1rem;
    color: var(--error);
    font-size: 0.9rem;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-top: 1rem;
}

.error-icon {
    flex-shrink: 0;
    font-size: 1.1rem;
}

/* ── Responsive ── */
@media (max-width: 992px) {
    .cards-grid,
    .all-docs-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .header-title {
        font-size: 1.2rem;
    }
    .header-subtitle {
        font-size: 0.8rem;
    }
    .cards-grid,
    .all-docs-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }
    .tab-btn {
        font-size: 0.85rem;
        padding: 0.75rem 1rem;
    }
    .result-preview {
        grid-template-columns: 1fr;
    }
    .result-image {
        max-width: 100%;
        width: 100%;
        height: auto;
    }
    .dropzone {
        padding: 1.5rem 1rem;
    }
    .modal {
        max-height: 95vh;
    }
    .crop-container {
        max-height: 40vh;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.75rem;
    }
    .header {
        padding: 1rem 0;
    }
    .header-icon {
        display: none;
    }
    .header-title {
        font-size: 1.05rem;
    }
    .card {
        padding: 1.25rem;
    }
    .tab-btn {
        font-size: 0.8rem;
        padding: 0.65rem 0.5rem;
    }
    .tab-icon {
        display: none;
    }
    .modal-body {
        padding: 1rem;
    }
}

/* ── Cropper.js overrides ── */
.cropper-view-box,
.cropper-face {
    border-radius: 0;
}

.cropper-view-box {
    outline: 2px solid var(--primary);
    outline-color: rgba(26, 35, 126, 0.85);
}

.cropper-line {
    background-color: var(--primary);
}

.cropper-point {
    background-color: var(--primary);
}

/* ── Accessibility ── */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* High contrast focus */
*:focus-visible {
    outline: 2px solid var(--primary-lighter);
    outline-offset: 2px;
}