/* assets/css/style.css - Ultra Responsive Cross-Device Edition with Pastel Status Stepper */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Prompt:wght@300;400;500;600;700&display=swap');

:root {
    /* Light Mode Color Palette */
    --bg-main: #f8fafc;
    --bg-surface: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --border-color: #e2e8f0;
    --border-highlight: #c7d2fe;
    
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #6366f1 100%);
    --accent-cyan: #0284c7;
    --accent-purple: #7c3aed;
    --accent-gold: #d97706;
    --success: #10b981;
    --danger: #ef4444;

    /* Pastel Status Colors */
    --pastel-blue-bg: #e0f2fe;
    --pastel-blue-border: #bae6fd;
    --pastel-blue-text: #0284c7;

    --pastel-green-bg: #d1fae5;
    --pastel-green-border: #a7f3d0;
    --pastel-green-text: #047857;

    --pastel-red-bg: #fee2e2;
    --pastel-red-border: #fca5a5;
    --pastel-red-text: #b91c1c;

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;

    --font-heading: 'Prompt', 'Plus Jakarta Sans', sans-serif;
    --font-body: 'Prompt', 'Plus Jakarta Sans', sans-serif;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.06), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
    --shadow-lg: 0 20px 35px -10px rgba(79, 70, 229, 0.12);
    --shadow-glow: 0 0 20px rgba(79, 70, 229, 0.2);
    
    --radius-xl: 20px;
    --radius-lg: 14px;
    --radius-md: 10px;
    --radius-sm: 6px;
}

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

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

body {
    font-family: var(--font-body);
    background-color: var(--bg-main);
    background-image: 
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.06) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(14, 165, 233, 0.06) 0px, transparent 50%);
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    padding-bottom: 60px;
    overflow-x: hidden;
}

/* Header Navbar */
.app-navbar {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 12px 0;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    flex-shrink: 0;
}

.nav-logo-box {
    width: 42px;
    height: 42px;
    background: var(--primary-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-size: 1.3rem;
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
}

.nav-brand-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.3px;
    line-height: 1.2;
}

.nav-brand-subtitle {
    font-size: 0.72rem;
    color: var(--text-secondary);
    display: block;
}

.nav-user-area {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
}

.nav-progress-widget {
    display: flex;
    align-items: center;
    gap: 10px;
    background: #f1f5f9;
    border: 1px solid var(--border-color);
    padding: 6px 14px;
    border-radius: 30px;
}

.progress-bar-bg {
    width: 80px;
    height: 8px;
    background: #e2e8f0;
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #4f46e5, #10b981);
    border-radius: 4px;
    transition: width 0.5s ease;
}

.user-profile-card {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    padding: 6px 12px;
    border-radius: 30px;
    background: #ffffff;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: all 0.25s ease;
}

.user-profile-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
    transform: translateY(-1px);
}

.avatar-circle {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, #0284c7, #4f46e5);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.95rem;
    box-shadow: 0 2px 8px rgba(2, 132, 199, 0.3);
}

/* Layout Container */
.main-wrapper {
    max-width: 1280px;
    margin: 24px auto 0;
    padding: 0 20px;
}

/* Course Hero Header */
.course-hero-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 28px;
    margin-bottom: 24px;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.course-hero-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 300px;
    height: 100%;
    background: radial-gradient(circle at 100% 0%, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.badge-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.4px;
}

.badge-purple { background: #f3e8ff; color: #7e22ce; border: 1px solid #e9d5ff; }
.badge-green  { background: #d1fae5; color: #047857; border: 1px solid #a7f3d0; }
.badge-blue   { background: #e0f2fe; color: #0369a1; border: 1px solid #bae6fd; }
.badge-amber  { background: #fef3c7; color: #b45309; border: 1px solid #fde68a; }

.hero-course-title {
    font-size: clamp(1.4rem, 3.5vw, 2.1rem);
    font-weight: 700;
    margin: 12px 0 8px;
    color: #0f172a;
    line-height: 1.3;
}

.hero-course-desc {
    color: var(--text-secondary);
    font-size: clamp(0.88rem, 2vw, 1rem);
    max-width: 850px;
    margin-bottom: 20px;
}

/* Metric Overview Dashboard */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
    margin-top: 20px;
}

.metric-card {
    background: #f8fafc;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 14px;
    transition: all 0.25s ease;
}

.metric-card:hover {
    border-color: var(--border-highlight);
    background: #ffffff;
    box-shadow: var(--shadow-sm);
}

.metric-icon-box {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.metric-val {
    font-size: 1.35rem;
    font-weight: 700;
    color: #0f172a;
    line-height: 1;
    margin-bottom: 3px;
}

.metric-lbl {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Workflow Step Tracker Navigation with Pastel Colors */
.stepper-nav {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
    margin-bottom: 24px;
}

.step-item {
    border-radius: var(--radius-lg);
    padding: 14px 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.25s ease;
    user-select: none;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    background: #ffffff;
    position: relative;
}

/* Completed Step (Pastel Green - เขียวปกติ) */
.step-item.step-completed {
    background-color: var(--pastel-green-bg) !important;
    border-color: var(--pastel-green-border) !important;
}

.step-item.step-completed .step-info-title {
    color: var(--pastel-green-text) !important;
}

.step-item.step-completed .step-info-sub {
    color: #047857 !important;
}

.step-item.step-completed .step-number {
    background-color: #10b981 !important;
    color: #ffffff !important;
}

/* Blue Step (Pastel Sky Blue - สำหรับไฟล์งานประกอบการอบรมเท่านั้น) */
.step-item.step-blue {
    background-color: var(--pastel-blue-bg) !important;
    border-color: var(--pastel-blue-border) !important;
}

.step-item.step-blue .step-info-title {
    color: var(--pastel-blue-text) !important;
}

.step-item.step-blue .step-info-sub {
    color: #0369a1 !important;
}

.step-item.step-blue .step-number {
    background-color: #0284c7 !important;
    color: #ffffff !important;
}

/* Pending Step (Pastel Red / Coral - แดงปกติ) */
.step-item.step-pending {
    background-color: var(--pastel-red-bg) !important;
    border-color: var(--pastel-red-border) !important;
}

.step-item.step-pending .step-info-title {
    color: var(--pastel-red-text) !important;
}

.step-item.step-pending .step-info-sub {
    color: #991b1b !important;
}

.step-item.step-pending .step-number {
    background-color: #ef4444 !important;
    color: #ffffff !important;
}

/* Locked Step */
.step-item.step-locked {
    background-color: #f1f5f9 !important;
    border-color: #cbd5e1 !important;
    opacity: 0.75;
}

.step-item.step-locked .step-info-title {
    color: #64748b !important;
}

.step-item.step-locked .step-number {
    background-color: #94a3b8 !important;
    color: #ffffff !important;
}

/* Active Step Outline Glow */
.step-item.active {
    outline: 3px solid var(--primary);
    outline-offset: -2px;
    box-shadow: 0 0 16px rgba(79, 70, 229, 0.3) !important;
}

.step-number {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #f1f5f9;
    color: #475569;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
    flex-shrink: 0;
    transition: all 0.2s ease;
}

.step-info-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: #0f172a;
}

.step-info-sub {
    font-size: 0.72rem;
    color: var(--text-secondary);
}

/* Tab Panels & Cards */
.panel-container {
    display: none;
    animation: slideUp 0.35s ease;
}

.panel-container.active {
    display: block;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.content-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 28px;
    box-shadow: var(--shadow-md);
}

.card-header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 16px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 10px;
}

.card-header-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: #0f172a;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Question & Quiz Styles */
.quiz-question-box {
    background: #f8fafc;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    margin-bottom: 16px;
    transition: all 0.2s ease;
}

.quiz-question-box:hover {
    border-color: #cbd5e1;
    background: #ffffff;
    box-shadow: var(--shadow-sm);
}

.q-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 14px;
    color: #0f172a;
}

.options-pill-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.radio-pill {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.2s ease;
    color: #334155;
    font-size: 0.9rem;
    min-height: 48px;
}

.radio-pill:hover {
    background: #e0e7ff;
    border-color: var(--primary);
    color: var(--primary-hover);
}

.radio-pill input[type="radio"] {
    accent-color: var(--primary);
    width: 18px;
    height: 18px;
}

/* Resource Grid */
.resources-layout-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}

.resource-item-card {
    background: #f8fafc;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all 0.25s ease;
}

.resource-item-card:hover {
    transform: translateY(-3px);
    border-color: var(--border-highlight);
    background: #ffffff;
    box-shadow: var(--shadow-md);
}

/* Form Controls */
.form-input-group {
    margin-bottom: 18px;
}

.form-label-text {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 6px;
    color: #1e293b;
}

.form-input-field {
    width: 100%;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    color: #0f172a;
    font-family: var(--font-body);
    font-size: 0.95rem;
    outline: none;
    transition: all 0.25s ease;
    min-height: 44px;
}

.form-input-field:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.12);
}

/* Drag and Drop Zone */
.dropzone-box {
    border: 2px dashed #cbd5e1;
    border-radius: var(--radius-lg);
    padding: 30px 16px;
    text-align: center;
    background: #f8fafc;
    cursor: pointer;
    transition: all 0.25s ease;
}

.dropzone-box:hover {
    border-color: var(--primary);
    background: #e0e7ff;
}

/* Certificate Box */
.cert-frame-wrapper {
    background: #f8fafc;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    text-align: center;
    overflow-x: auto;
}

#certificateCanvas {
    max-width: 100%;
    height: auto;
}

/* Action Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    border: none;
    transition: all 0.25s ease;
    text-decoration: none;
    min-height: 44px;
}

.btn-primary {
    background: var(--primary-gradient);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.45);
}

.btn-secondary {
    background: #f1f5f9;
    color: #334155;
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: #e2e8f0;
    color: #0f172a;
}

.btn-success {
    background: linear-gradient(135deg, #059669 0%, #10b981 100%);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.45);
}

/* Modal Dialog Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.55);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 16px;
    animation: fadeIn 0.25s ease;
}

.modal-overlay.active {
    display: flex;
}

.modal-card {
    background: #ffffff;
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 520px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 24px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-color);
    position: relative;
    animation: scaleUp 0.25s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scaleUp {
    from { transform: scale(0.95); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.modal-header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border-color);
}

.modal-close-btn {
    background: #f1f5f9;
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: all 0.2s ease;
}

.modal-close-btn:hover {
    background: #e2e8f0;
    color: #0f172a;
}

/* User Switcher Cards inside Modal */
.user-select-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.user-select-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: #f8fafc;
    cursor: pointer;
    transition: all 0.2s ease;
}

.user-select-item:hover {
    background: #ffffff;
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.user-select-item.selected {
    border-color: var(--primary);
    background: #e0e7ff;
}

/* Footer */
.app-footer-bar {
    max-width: 1280px;
    margin: 40px auto 0;
    padding: 20px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.82rem;
    border-top: 1px solid var(--border-color);
}

/* Media Queries */
@media (max-width: 1199px) {
    .metrics-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 991px) {
    .nav-container { flex-wrap: wrap; }
    .stepper-nav { grid-template-columns: repeat(3, 1fr); }
    .options-pill-grid { grid-template-columns: 1fr; }
}

@media (max-width: 767px) {
    .nav-container { padding: 0 16px; }
    .nav-brand-subtitle { display: none; }
    .nav-user-area {
        gap: 8px;
        width: 100%;
        justify-content: space-between;
        margin-top: 8px;
        padding-top: 8px;
        border-top: 1px dashed var(--border-color);
    }
    .nav-progress-widget { padding: 4px 10px; }
    .progress-bar-bg { width: 60px; }
    .course-hero-card { padding: 20px; border-radius: var(--radius-lg); }
    .metrics-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .metric-card { padding: 12px; gap: 10px; }
    .metric-icon-box { width: 38px; height: 38px; font-size: 1rem; }
    .metric-val { font-size: 1.15rem; }
    .metric-lbl { font-size: 0.72rem; }
    .stepper-nav {
        display: flex;
        overflow-x: auto;
        padding-bottom: 8px;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
    }
    .step-item {
        flex: 0 0 170px;
        scroll-snap-align: start;
        padding: 10px 12px;
    }
    .content-card { padding: 20px; border-radius: var(--radius-lg); }
    .card-header-title { font-size: 1.1rem; }
    .modal-card { padding: 20px; margin: 10px; }
    .btn { width: 100%; }
}

@media (max-width: 575px) {
    .metrics-grid { grid-template-columns: 1fr; }
    .options-pill-grid { grid-template-columns: 1fr; }
    .user-profile-card { padding: 4px 10px; }
    .avatar-circle { width: 32px; height: 32px; font-size: 0.85rem; }
}