/* ============================================================
   main.css — Base, Layout, Header, Nav, Form, Summary, Modal (ใช้ร่วมทุกหน้า)
   ============================================================ */

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --bg-color: #f1f5f9;
    --card-bg: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border-color: #cbd5e1;
    --danger-color: #ef4444;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    /* เวอร์ชัน "เข้ม" ใช้กับตัวอักษรขาวบนพื้นสี / ตัวหนังสือสี — ให้อ่านชัดกลางแดด (คอนทราสต์ ≥ 4.5:1) */
    --danger-strong: #b91c1c;
    --success-strong: #047857;
    --warning-strong: #b45309;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Prompt', sans-serif;
}

html {
    overflow-x: hidden;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    padding: 12px;
    min-height: 100vh;
    overflow-x: hidden;
}

.app-container {
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

/* Header */
header {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    color: white;
    padding: 16px 20px;
    border-radius: 16px;
    margin-bottom: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    width: 100%;
    max-width: 100%;
    overflow: hidden;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 18px;
    min-width: 0;
    max-width: 100%;
    flex: 1 1 auto;
}

/* ไม่มีพื้นหลัง/กรอบ ขนาดเท่าต้นฉบับก่อนแก้ (height 90px) แค่เอาความจางออกให้สีเต็ม */
.header-logo {
    height: 90px;
    width: auto;
    max-width: 260px;
    object-fit: contain;
    border-radius: 8px;
    display: block;
    flex-shrink: 0;
}

/* เส้นคั่นบางๆ ระหว่างโลโก้กับชื่อระบบ ให้ดูเป็นชุดเดียวกันมากขึ้น */
.header-title {
    padding-left: 18px;
    border-left: 1px solid rgba(255, 255, 255, 0.18);
    min-width: 0;
    overflow: hidden;
}

.header-title h1 {
    line-height: 1.25;
    font-size: 45px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.header-title p {
    color: #94a3b8;
    font-size: 20px;
    margin-top: 2px;
    white-space: normal;
    overflow-wrap: break-word;
}

@media (max-width: 640px) {
    header { padding: 12px 14px; }
    .header-logo { height: 56px; }
    .header-brand { gap: 12px; }
    .header-title { padding-left: 12px; }
    .header-title h1 { font-size: 16px; }
    .header-title p { font-size: 11px; }
}

@media (max-width: 480px) {
    .header-title { padding-left: 10px; }
    .header-title h1 { font-size: 14px; }
    .header-title p { font-size: 10.5px; line-height: 1.35; }
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    max-width: 100%;
}

@media (max-width: 640px) {
    .header-actions { gap: 8px; }
    .btn-auth { font-size: 11px; padding: 5px 10px; }
    .status-badge { font-size: 11px; padding: 5px 10px; }
}

.status-badge {
    background: rgba(255, 255, 255, 0.1);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--warning-color);
}

.status-dot.online {
    background-color: var(--success-color);
    box-shadow: 0 0 8px var(--success-color);
}

.btn-auth {
    background-color: rgba(255, 255, 255, 0.15);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s;
}

.btn-auth:hover {
    background-color: white;
    color: var(--text-main);
}

.btn-auth.is-admin {
    background-color: var(--success-strong);
    border-color: var(--success-strong);
}

/* Category Nav Tabs */
.category-nav {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 8px;
    margin-bottom: 16px;
    -webkit-overflow-scrolling: touch;
}

.category-nav::-webkit-scrollbar {
    height: 6px;
}
.category-nav::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

.nav-tab {
    background: white;
    border: 1.5px solid var(--border-color);
    padding: 10px 18px;
    min-height: 44px;
    display: flex;
    align-items: center;
    border-radius: 22px;
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
    cursor: pointer;
    color: var(--text-muted);
    transition: all 0.2s;
}

.nav-tab:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.nav-tab.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: 0 2px 6px rgba(37, 99, 235, 0.3);
}

/* ============================================================
   [NEW] เวอร์ชันมือถือของแท็บหมวดหมู่ (#categoryNav) — dropdown แทนแท็บ
   จอกว้างยังเห็นเป็นแท็บตามปกติ ส่วนจอแคบ (มือถือ) สลับมาเป็น <select> แทน
   เพื่อไม่ต้องเลื่อนแท็บยาว ๆ ในแนวนอนบนจอเล็ก
   ============================================================ */
.category-nav-select {
    display: none;
    margin-bottom: 16px;
}

@media (max-width: 768px) {
    #categoryNav.category-nav {
        display: none;
    }
    .category-nav-select {
        display: block;
    }
}

/* ============================================================
   Main view switcher (คลังอุปกรณ์ / ยืม-คืน / เบิกใช้)
   ให้หน้าตาต่างจากแท็บหมวดหมู่ย่อยด้านล่างชัดเจน (การ์ดใหญ่กว่า + สีทึบตอนเลือก)
   กันสับสนว่าอันไหนคือเมนูหลัก อันไหนคือตัวกรองหมวดหมู่
   ============================================================ */
.main-view-nav {
    display: flex;
    gap: 8px;
    background: var(--card-bg);
    padding: 6px;
    border-radius: 16px;
    border: 1.5px solid var(--border-color);
    margin-bottom: 14px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    overflow-x: auto;
}

.main-view-nav .nav-tab {
    flex: 1 1 0;
    justify-content: center;
    display: flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 15px;
    font-weight: 700;
    padding: 12px 16px;
    border-radius: 11px;
    white-space: nowrap;
}

.main-view-nav .nav-tab:hover {
    color: var(--primary-color);
    border-color: transparent;
    background: #eff6ff;
}

.main-view-nav .nav-tab.active {
    background: var(--primary-color);
    color: #ffffff;
    box-shadow: 0 3px 10px rgba(37, 99, 235, 0.35);
}

@media (max-width: 560px) {
    .main-view-nav .nav-tab { font-size: 13px; padding: 11px 8px; gap: 5px; }
}

/* Layout Grid */
.content-grid {
    display: grid;
    grid-template-columns: 340px minmax(0, 1fr);
    gap: 16px;
    width: 100%;
}

.content-grid.no-form {
    grid-template-columns: minmax(0, 1fr) !important;
}

.main-content-area {
    width: 100%;
    min-width: 0;
}

@media (max-width: 900px) {
    .content-grid {
        grid-template-columns: 1fr;
    }
}

/* Card Elements */
.card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 18px;
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    height: fit-content;
}

.card-title {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-group {
    margin-bottom: 12px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--border-color);
    border-radius: 10px;
    font-size: 15px;
    outline: none;
    background-color: #fff;
}

.form-control:focus {
    border-color: var(--primary-color);
}

/* Dropdown & Search Bar Combo */
.select-search-box {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: #f8fafc;
    padding: 6px;
    border-radius: 10px;
    border: 1.5px solid var(--border-color);
}

.select-search-box .inner-search {
    padding: 6px 10px;
    font-size: 13px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.select-search-box select {
    border: none;
    background: transparent;
    padding: 6px 4px;
    font-size: 14px;
}

.btn-submit {
    width: 100%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
}

/* Summary Boxes */
.summary-box {
    background: #fffbeb;
    border-radius: 14px;
    border: 1px solid #fde68a;
    padding: 14px;
    margin-bottom: 16px;
}

.summary-header {
    font-size: 14px;
    font-weight: 700;
    color: #92400e;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.summary-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.summary-tag {
    background: #ffffff;
    color: #334155;
    font-size: 13px;
    padding: 4px 10px;
    border-radius: 14px;
    border: 1px solid #cbd5e1;
}

.summary-tag.tag-total {
    background: #fef3c7;
    border-color: #fde68a;
    font-weight: 700;
    color: #78350f;
}

/* Controls & Mode Switcher */
.controls-bar {
    background: var(--card-bg);
    padding: 14px;
    border-radius: 14px;
    border: 1px solid var(--border-color);
    margin-bottom: 16px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
}

.search-box {
    flex: 1;
    min-width: 200px;
    position: relative;
}

.search-box i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-box input {
    padding-left: 40px;
}

.view-mode-toggle {
    display: flex;
    background: #e2e8f0;
    padding: 3px;
    border-radius: 10px;
    gap: 2px;
}

.toggle-btn {
    border: none;
    background: transparent;
    padding: 10px 14px;
    min-height: 44px;
    font-size: 14px;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
}

.toggle-btn.active {
    background: #ffffff;
    color: var(--primary-color);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.items-list-container {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 14px;
    -webkit-overflow-scrolling: touch;
}

.items-list-container::-webkit-scrollbar {
    height: 10px;
}
.items-list-container::-webkit-scrollbar-track {
    background: #e2e8f0;
    border-radius: 6px;
}
.items-list-container::-webkit-scrollbar-thumb {
    background: #94a3b8;
    border-radius: 6px;
}

/* Shared list layouts & tags */
.items-list-vertical {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 14px;
    width: 100%;
}

.category-tag {
    display: inline-block;
    background: #eff6ff;
    color: #1e40af;
    font-size: 11px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 10px;
    border: 1px solid #bfdbfe;
    margin-top: 3px;
}

/* Shared buttons & empty state */
.btn-delete {
    background: transparent;
    border: none;
    color: #94a3b8;
    padding: 6px 8px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
}

.btn-delete:hover {
    color: var(--danger-color);
    background-color: #fef2f2;
}

.empty-state {
    padding: 40px;
    text-align: center;
    color: var(--text-muted);
    width: 100%;
    grid-row: span 4;
}

/* Modal Lock & Preview */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-card {
    background: white;
    padding: 24px;
    border-radius: 16px;
    width: 100%;
    max-width: 360px;
    text-align: center;
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

.modal-card i.icon-lock {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.modal-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 6px;
}

.modal-card p {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.pin-input {
    letter-spacing: 8px;
    font-size: 24px;
    text-align: center;
    font-weight: 700;
    margin-bottom: 16px;
}

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

.btn-modal-cancel {
    flex: 1;
    background: #e2e8f0;
    border: none;
    padding: 10px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
}

.btn-modal-confirm {
    flex: 1;
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 10px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
}

/* ============================================================
   [NEW] Export report buttons (ใช้ทั้งหน้าคลังและหน้ายืม-คืน)
   ============================================================ */
.export-group {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.export-label {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn-export {
    border: 1.5px solid var(--border-color);
    background: #ffffff;
    color: var(--text-main);
    padding: 10px 14px;
    min-height: 44px;
    font-size: 14px;
    font-weight: 700;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s;
}

.btn-export:hover {
    border-color: var(--success-color);
    color: var(--success-color);
    background: #ecfdf5;
}

.btn-export.csv:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: #eff6ff;
}

/* ปุ่มใน modal ทั่วไป (PIN / คืนของ / ขยายเวลา) ให้กดง่ายตอนมือเปื้อน */
.btn-modal-cancel,
.btn-modal-confirm {
    min-height: 48px;
    font-size: 15px;
}