/* ============================================
   YNDLUX Spec Generator - Global Styles
   ============================================ */

/* --- Base --- */
:root {
    --yndlux-red: #E60013;
    --yndlux-red-dark: #c00010;
    --yndlux-red-light: #ff1a2e;
    --yndlux-bg: #f0f2f5;
    --yndlux-card-shadow: 0 2px 8px rgba(0,0,0,0.06);
    --yndlux-card-hover: 0 6px 20px rgba(0,0,0,0.1);
    --yndlux-radius: 10px;
    --yndlux-transition: 0.2s ease;
}

body {
    background: var(--yndlux-bg);
    font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
    color: #333;
}

/* --- Navbar --- */
.brand-navbar {
    background: linear-gradient(135deg, var(--yndlux-red) 0%, #b8000f 100%);
    box-shadow: 0 2px 12px rgba(230,0,19,0.25);
    padding: 0.6rem 0;
}
.brand-navbar .navbar-brand {
    color: #fff;
    font-weight: 700;
    font-size: 1.15rem;
    letter-spacing: 0.3px;
}
.brand-navbar .navbar-brand {
    letter-spacing: 1px;
}
.brand-navbar .nav-link {
    color: rgba(255,255,255,0.8);
    font-size: 0.92rem;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: all var(--yndlux-transition);
}
.brand-navbar .nav-link:hover {
    color: #fff;
    background: rgba(255,255,255,0.12);
}
.brand-navbar .nav-link.active {
    color: #fff;
    font-weight: 600;
    background: rgba(255,255,255,0.18);
}

/* --- Cards --- */
.card {
    border: none;
    border-radius: var(--yndlux-radius);
    box-shadow: var(--yndlux-card-shadow);
    transition: box-shadow var(--yndlux-transition);
    margin-bottom: 22px;
    overflow: hidden;
}
.card:hover {
    box-shadow: var(--yndlux-card-hover);
}
.card-header {
    background: #fff;
    border-bottom: 2px solid var(--yndlux-red);
    font-weight: 600;
    font-size: 1.05rem;
    padding: 14px 20px;
    color: #222;
}

/* --- Buttons --- */
.btn-yndlux {
    background: linear-gradient(135deg, var(--yndlux-red) 0%, var(--yndlux-red-dark) 100%);
    border: none;
    color: #fff;
    font-weight: 600;
    border-radius: 8px;
    padding: 12px 24px;
    transition: all var(--yndlux-transition);
    box-shadow: 0 3px 10px rgba(230,0,19,0.3);
}
.btn-yndlux:hover {
    background: linear-gradient(135deg, var(--yndlux-red-light) 0%, var(--yndlux-red) 100%);
    color: #fff;
    box-shadow: 0 5px 16px rgba(230,0,19,0.4);
    transform: translateY(-1px);
}
.btn-yndlux:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(230,0,19,0.3);
}
.btn-yndlux:disabled {
    opacity: 0.7;
    transform: none;
    box-shadow: none;
}

.btn-outline-yndlux {
    color: var(--yndlux-red);
    border: 1.5px solid var(--yndlux-red);
    border-radius: 6px;
    font-weight: 500;
    transition: all var(--yndlux-transition);
}
.btn-outline-yndlux:hover {
    background: var(--yndlux-red);
    color: #fff;
    box-shadow: 0 2px 8px rgba(230,0,19,0.25);
}

/* --- Form Controls --- */
.form-control, .form-select {
    border-radius: 8px;
    border: 1.5px solid #dde1e6;
    transition: border-color var(--yndlux-transition), box-shadow var(--yndlux-transition);
}
.form-control:focus, .form-select:focus {
    border-color: var(--yndlux-red);
    box-shadow: 0 0 0 3px rgba(230,0,19,0.1);
}
.form-label {
    font-weight: 500;
    font-size: 0.9rem;
    color: #444;
    margin-bottom: 4px;
}

/* --- Dynamic Rows --- */
.dynamic-row {
    display: flex;
    gap: 8px;
    margin-bottom: 10px;
    align-items: center;
    animation: fadeIn 0.25s ease;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Checkbox Grid --- */
.checkbox-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 14px;
}
.checkbox-grid label {
    font-weight: normal;
    white-space: nowrap;
    font-size: 0.88rem;
    color: #555;
    cursor: pointer;
    padding: 3px 0;
    transition: color var(--yndlux-transition);
}
.checkbox-grid label:hover {
    color: var(--yndlux-red);
}
.checkbox-grid input[type="checkbox"] {
    accent-color: var(--yndlux-red);
}

/* --- Hints --- */
.hint {
    color: #999;
    font-size: 0.82rem;
    margin-top: 3px;
}
.img-hint {
    color: #aaa;
    font-size: 0.78rem;
    display: block;
    margin-top: 4px;
}

/* --- Image Preview --- */
.img-preview {
    max-height: 90px;
    max-width: 140px;
    object-fit: contain;
    margin-top: 8px;
    border-radius: 6px;
    border: 1.5px solid #eee;
    display: none;
    animation: fadeIn 0.3s ease;
}

/* --- Light Table --- */
#light-table input {
    width: 100%;
    border: 1.5px solid #dee2e6;
    border-radius: 6px;
    padding: 5px 8px;
    font-size: 0.88rem;
    transition: border-color var(--yndlux-transition);
}
#light-table input:focus {
    border-color: var(--yndlux-red);
    outline: none;
    box-shadow: 0 0 0 2px rgba(230,0,19,0.08);
}

/* --- Loading Overlay --- */
.loading-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.45);
    backdrop-filter: blur(4px);
    z-index: 9999;
    justify-content: center;
    align-items: center;
}
.loading-overlay.active { display: flex; }
.loading-box {
    background: #fff;
    border-radius: 16px;
    padding: 44px 56px;
    text-align: center;
    box-shadow: 0 12px 40px rgba(0,0,0,0.2);
    animation: popIn 0.3s ease;
    min-width: 320px;
    max-width: 420px;
    width: 90%;
}
@keyframes popIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}
.gen-progress-wrap { width: 100%; }
.gen-progress-wrap .progress { background: #f0f0f0; }
.gen-progress-wrap .progress-bar {
    font-size: 0.85rem;
    font-weight: 600;
    transition: width 0.3s ease;
}
.gen-progress-wrap p {
    font-size: 0.9rem;
    color: #666;
}
.loading-box .spinner-border {
    width: 3rem;
    height: 3rem;
    color: var(--yndlux-red);
    border-width: 3px;
}
.loading-box p {
    margin-top: 18px;
    font-size: 1.05rem;
    color: #444;
    font-weight: 500;
}

/* --- History Cards --- */
.card-item {
    transition: all var(--yndlux-transition);
    cursor: default;
}
.card-item:hover {
    box-shadow: var(--yndlux-card-hover);
    transform: translateY(-2px);
}
.lang-tag {
    font-size: 11px;
    padding: 2px 10px;
    border-radius: 12px;
    font-weight: 600;
    letter-spacing: 0.3px;
}
.lang-en { background: #e3f2fd; color: #1565c0; }
.lang-zh { background: #fce4ec; color: #c62828; }
.lang-ru { background: #e8f5e9; color: #2e7d32; }
.type-label {
    font-size: 12px;
    color: #666;
    background: #f0f0f0;
    padding: 3px 10px;
    border-radius: 12px;
}
.type-badge {
    cursor: pointer;
    margin: 4px;
    transition: all var(--yndlux-transition);
    border-radius: 16px;
    padding: 5px 14px;
}
.type-badge:hover { opacity: 0.85; }
.type-badge.active {
    background: var(--yndlux-red) !important;
    border-color: var(--yndlux-red) !important;
    color: #fff !important;
}
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: #bbb;
}
.file-size { color: #999; font-size: 12px; }
.time-text { color: #999; font-size: 12px; }

/* --- Footer --- */
.app-footer {
    text-align: center;
    padding: 20px 0 30px;
    color: #bbb;
    font-size: 0.8rem;
}

/* Upload zone small variant (for size drawings) */
.upload-zone-sm {
    padding: 8px 12px;
    min-height: auto;
}
.upload-zone-sm .upload-icon { font-size: 1.2rem; }
.upload-zone-sm .upload-text { font-size: 0.8rem; }

/* Size row styling */
.size-row {
    border: 1px solid #eee;
    border-radius: 8px;
    padding: 12px;
    background: #fafafa;
}
.size-row:hover {
    border-color: #ddd;
    background: #fff;
}

/* ============================================
   IMAGE PROCESSING TOOL CARD
   ============================================ */

.card-tool .card-header {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    color: #fff;
}

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

.img-tool-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 5px 12px;
    border: 1.5px solid #ddd;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all var(--yndlux-transition);
    background: #fafafa;
    white-space: nowrap;
    user-select: none;
}

.img-tool-chip:hover {
    border-color: var(--yndlux-red);
    background: #fff5f5;
}

.img-tool-chip:has(input:checked) {
    border-color: var(--yndlux-red);
    background: linear-gradient(135deg, #fff5f5, #ffe8ea);
    box-shadow: 0 0 0 1px var(--yndlux-red);
}

.img-tool-chip input[type="checkbox"] {
    accent-color: var(--yndlux-red);
    margin: 0;
    width: 14px;
    height: 14px;
}

/* Preview modal */
#imgPreviewModal .modal-header {
    border-bottom: 2px solid var(--yndlux-red);
}

#imgPreviewModal .preview-result img {
    max-height: 350px;
    object-fit: contain;
    border: 1px solid #eee;
    background: #f9f9f9;
}

@media (max-width: 576px) {
    .img-tool-row {
        gap: 6px;
    }
    .img-tool-chip {
        font-size: 0.78rem;
        padding: 4px 8px;
    }
    #imgPreviewModal .preview-result img {
        max-height: 200px;
    }
}

/* ============================================
   NEW MOBILE COMPONENTS
   ============================================ */

/* --- Progress Bar (top of form) --- */
.form-progress {
    display: none;
    position: sticky;
    top: 0;
    z-index: 100;
    background: #fff;
    padding: 10px 0 8px;
    margin: -16px -12px 12px;
    padding: 10px 12px 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.form-progress .progress {
    height: 6px;
    border-radius: 3px;
    background: #e9ecef;
}
.form-progress .progress-bar {
    background: linear-gradient(90deg, var(--yndlux-red), #ff6b6b);
    border-radius: 3px;
    transition: width 0.4s ease;
}
.form-progress .progress-text {
    font-size: 0.72rem;
    color: #999;
    margin-top: 4px;
    text-align: center;
}

/* --- Collapsible Card Headers (mobile) --- */
.card-header[data-bs-toggle="collapse"] {
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}
.card-header .collapse-icon {
    display: none;
    width: 20px;
    height: 20px;
    transition: transform 0.3s ease;
    flex-shrink: 0;
    margin-left: 8px;
}
.card-header .collapse-icon svg {
    width: 100%;
    height: 100%;
    fill: #999;
}
.card-header[aria-expanded="false"] .collapse-icon {
    transform: rotate(-90deg);
}
.card-header[aria-expanded="true"] .collapse-icon {
    transform: rotate(0deg);
}
.card-header .section-check {
    display: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #4caf50;
    color: #fff;
    font-size: 10px;
    line-height: 18px;
    text-align: center;
    margin-right: 8px;
    flex-shrink: 0;
    animation: popIn 0.3s ease;
}

/* --- Upload Zone --- */
.upload-zone {
    border: 2px dashed #d0d5dd;
    border-radius: 10px;
    padding: 20px 16px;
    text-align: center;
    cursor: pointer;
    transition: all var(--yndlux-transition);
    background: #fafbfc;
    position: relative;
}
.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--yndlux-red);
    background: #fff5f5;
}
.upload-zone .upload-icon {
    font-size: 28px;
    margin-bottom: 6px;
    display: block;
}
.upload-zone .upload-text {
    font-size: 0.82rem;
    color: #888;
}
.upload-zone .upload-text strong {
    color: var(--yndlux-red);
}
.upload-zone input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
    width: 100%;
    height: 100%;
}
.upload-zone .upload-filename {
    display: none;
    font-size: 0.8rem;
    color: #4caf50;
    margin-top: 4px;
    font-weight: 500;
}
.upload-zone.has-file {
    border-color: #4caf50;
    background: #f6fff6;
}
.upload-zone.has-file .upload-filename { display: block; }

/* --- Sticky Bottom Bar (mobile) --- */
.sticky-bottom-bar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: #fff;
    padding: 12px 16px;
    box-shadow: 0 -4px 16px rgba(0,0,0,0.1);
    z-index: 1000;
}
.sticky-bottom-bar .btn {
    width: 100%;
    font-size: 1rem;
    padding: 13px;
    border-radius: 10px;
}

/* ============================================
   MOBILE / RESPONSIVE
   ============================================ */

/* --- Navbar toggler (hamburger) --- */
.navbar-toggler {
    border: none;
    padding: 4px 8px;
}
.navbar-toggler:focus { box-shadow: none; }
.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255,255,255,0.9)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* --- Tablet (≤768px) --- */
@media (max-width: 768px) {
    .brand-navbar { padding: 0.5rem 0; }
    .brand-navbar .navbar-brand { font-size: 0.95rem; }
    .brand-navbar .nav-link { font-size: 0.88rem; padding: 8px 12px; }

    .card { margin-bottom: 14px; }
    .card-header { padding: 12px 16px; font-size: 0.95rem; }
    .card-body { padding: 14px 16px; }

    .loading-box { padding: 32px 24px; margin: 0 20px; }
    .loading-box .spinner-border { width: 2.5rem; height: 2.5rem; }
    .loading-box p { font-size: 0.95rem; }

    .empty-state { padding: 50px 16px; }
    .card-body > .row > .col-md-6 { margin-bottom: 8px; }

    /* Show upload zones */
    .upload-zone { padding: 16px 12px; }
    .upload-zone .upload-icon { font-size: 24px; }
}

/* --- Phone (≤576px) --- */
@media (max-width: 576px) {
    body { font-size: 14px; }
    html { scroll-behavior: smooth; }
    .container { padding-left: 12px; padding-right: 12px; }

    /* Navbar */
    .brand-navbar .navbar-brand { font-size: 0.88rem; letter-spacing: 0; }
    .brand-navbar .nav-link {
        padding: 10px 16px;
        border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    .brand-navbar .nav-link:last-child { border-bottom: none; }

    /* Show progress bar */
    .form-progress { display: block; }

    /* Collapsible cards */
    .card { border-radius: 10px; margin-bottom: 10px; }
    .card-header {
        padding: 12px 14px;
        font-size: 0.92rem;
        border-bottom-width: 2px;
    }
    .card-header .collapse-icon { display: block; }
    .card-header .section-check { display: inline-block; }
    .card-header[aria-expanded="false"] {
        border-bottom-color: transparent;
    }
    .card-body {
        padding: 14px;
    }

    /* Form inputs */
    .form-label { font-size: 0.85rem; margin-bottom: 3px; }
    .form-control, .form-select {
        font-size: 16px;
        padding: 11px 12px;
        border-radius: 8px;
    }
    .form-control-sm, .form-select-sm {
        font-size: 16px;
        padding: 9px 10px;
    }

    /* Dynamic rows */
    .dynamic-row { flex-wrap: wrap; gap: 6px; }
    .dynamic-row input[type="text"],
    .dynamic-row .form-control {
        min-width: 0;
        flex: 1 1 calc(50% - 20px);
    }

    /* Checkbox grid: 2 per row, bigger targets */
    .checkbox-grid { gap: 4px 8px; }
    .checkbox-grid label {
        font-size: 0.84rem;
        flex: 0 0 48%;
        padding: 8px 0;
        min-height: 40px;
        display: flex;
        align-items: center;
        gap: 6px;
    }

    /* Upload zones on mobile */
    .upload-zone {
        padding: 18px 12px;
        border-radius: 10px;
    }
    .upload-zone .upload-icon { font-size: 22px; margin-bottom: 4px; }
    .upload-zone .upload-text { font-size: 0.78rem; }

    /* Image preview */
    .img-preview { max-height: 70px; max-width: 100px; }

    /* Light table: horizontal scroll */
    .table-responsive { margin: 0 -14px; padding: 0 14px; }
    #light-table { font-size: 0.78rem; min-width: 500px; }
    #light-table input { padding: 6px; font-size: 14px; }
    #light-table th { font-size: 0.72rem; padding: 6px 5px; white-space: nowrap; }
    #light-table td { padding: 4px; }

    /* Hide desktop submit, show sticky bar */
    .desktop-submit { display: none !important; }
    .sticky-bottom-bar { display: block; }

    /* Add bottom padding for sticky bar */
    .container.pb-4 { padding-bottom: 80px !important; }

    /* History cards */
    .card-item .card-body { padding: 12px 14px; }
    .card-item .card-title { font-size: 0.92rem; }
    .type-badge { padding: 5px 12px; font-size: 0.78rem; }

    /* Loading overlay */
    .loading-box { padding: 28px 20px; margin: 0 16px; border-radius: 12px; }
    .loading-box .spinner-border { width: 2rem; height: 2rem; }
    .loading-box p { font-size: 0.88rem; margin-top: 14px; }

    /* Footer */
    .app-footer { padding: 16px 0 20px; font-size: 0.72rem; }

    /* Hints */
    .hint { font-size: 0.76rem; }
    .img-hint { font-size: 0.7rem; }
}

/* --- iOS safe area --- */
@supports (padding: env(safe-area-inset-bottom)) {
    .app-footer { padding-bottom: calc(20px + env(safe-area-inset-bottom)); }
    .brand-navbar { padding-top: calc(0.5rem + env(safe-area-inset-top)); }
    .sticky-bottom-bar { padding-bottom: calc(12px + env(safe-area-inset-bottom)); }
}

/* --- Touch-friendly --- */
@media (hover: none) and (pointer: coarse) {
    .btn-sm { min-height: 40px; min-width: 40px; }
    .btn-outline-danger { padding: 8px 14px; }
    .checkbox-grid label { padding: 8px 0; }
    .nav-link { padding: 10px 14px; }
    .type-badge { padding: 8px 16px; }
    .card-header { min-height: 48px; }
}