/* 
  Xenon Robotics IoT Trainer Kit style.css
  Theme: White/Light dominated, Crisp Black/Dark Grey text, and Vivid Blue (#0077fc) accents.
  Font: Neue Montreal / Inter
*/

:root {
    --bg-color: #ffffff;
    --card-bg: #ffffff;
    --card-hover: #fafafa;
    --text-primary: #000000;
    --text-secondary: #48484a;
    --text-muted: #8e8e93;
    --accent: #0077fc;
    --accent-glow: rgba(0, 119, 252, 0.08);
    --border-color: #e5e5ea;
    --border-hover: #c7c7cc;
    --font-sans: 'Neue Montreal', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'Fira Code', 'Courier New', Courier, monospace;
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base Reset & Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    background-color: var(--bg-color);
}

body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    background-color: var(--bg-color);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* Background Tech Elements */
.tech-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(#e5e5ea 1px, transparent 1px);
    background-size: 32px 32px;
    opacity: 0.6;
    z-index: -2;
    pointer-events: none;
}

.glow-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(140px);
    opacity: 0.06;
    z-index: -1;
    pointer-events: none;
    animation: pulseOrbs 10s infinite alternate ease-in-out;
}

.orb-1 {
    top: -10%;
    right: 5%;
    width: 500px;
    height: 500px;
    background: var(--accent);
}

.orb-2 {
    bottom: -10%;
    left: -5%;
    width: 600px;
    height: 600px;
    background: var(--accent);
    animation-delay: -3s;
}

@keyframes pulseOrbs {
    0% {
        transform: scale(1) translate(0, 0);
        opacity: 0.05;
    }
    100% {
        transform: scale(1.15) translate(30px, -20px);
        opacity: 0.09;
    }
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 10;
}

.header-logo {
    font-size: 0.95rem;
    font-weight: 800;
    letter-spacing: 0.15em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-accent {
    display: inline-block;
    width: 8px;
    height: 8px;
    background-color: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--accent);
}

.header-tag {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 0.25rem 0.75rem;
    border-radius: 100px;
    background: rgba(0, 0, 0, 0.02);
}

/* Hero Section */
.hero {
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: 6rem 0;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-badge {
    font-family: var(--font-mono);
    color: var(--accent);
    font-size: 0.8rem;
    letter-spacing: 0.2em;
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
    position: relative;
    font-weight: 600;
}

.hero-badge::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 1px;
    background-color: var(--accent);
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin-bottom: 2rem;
}

.gradient-text {
    color: transparent;
    background: linear-gradient(135deg, #000000 30%, var(--accent) 100%);
    background-clip: text;
    -webkit-background-clip: text;
}

.hero-desc {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 3rem;
    font-weight: 400;
}

.hero-cta {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.9rem 1.8rem;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-handbook-lg {
    padding: 1.15rem 2.25rem;
    font-size: 1.05rem;
    font-weight: 700;
    color: #ffffff !important;
    background: linear-gradient(135deg, #0052cc 0%, #0077fc 50%, #00b4d8 100%);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0, 119, 252, 0.35);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.85rem;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease, filter 0.3s ease;
}

.btn-handbook-lg::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.25) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.btn-handbook-lg:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 16px 40px rgba(0, 119, 252, 0.45);
    filter: brightness(1.08);
}

.btn-handbook-lg:hover::after {
    opacity: 1;
}

.btn-icon-lg {
    width: 20px;
    height: 20px;
    transition: transform 0.3s ease;
}

.btn-handbook-lg:hover .btn-icon-lg:last-child {
    transform: translateX(4px);
}

.btn-secondary-outline {
    background: rgba(0, 0, 0, 0.03);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1.05rem 1.8rem;
    font-size: 0.95rem;
    font-weight: 600;
}

.btn-secondary-outline:hover {
    background: rgba(0, 0, 0, 0.07);
    border-color: var(--text-primary);
    transform: translateY(-2px);
}

.btn-primary {
    background-color: var(--text-primary);
    color: var(--bg-color);
    border: 1px solid var(--text-primary);
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--text-primary);
    border-color: var(--border-hover);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
}

.btn-icon {
    width: 16px;
    height: 16px;
    transition: var(--transition-smooth);
}

.btn-primary:hover .btn-icon {
    transform: translateY(3px);
}

/* Programs Section */
.programs-section {
    padding: 6rem 0;
    border-top: 1px solid var(--border-color);
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    padding: 0.35rem 0.85rem;
    border-radius: 100px;
    color: #0077fc;
    background: rgba(0, 119, 252, 0.08);
    border: 1px solid rgba(0, 119, 252, 0.2);
    margin-bottom: 0.75rem;
}

.section-badge svg {
    width: 14px;
    height: 14px;
}

.handbook-count-badge {
    background: rgba(0, 119, 252, 0.06) !important;
    border-color: rgba(0, 119, 252, 0.2) !important;
    color: #0077fc !important;
    font-weight: 700;
}

/* Section Filter Bar & Filter Pills */
.handbook-filter-bar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 2.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.filter-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.25rem;
    border-radius: 100px;
    background: #ffffff;
    border: 1px solid var(--border-color);
    font-family: var(--font-sans);
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    user-select: none;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.02);
}

.filter-pill svg {
    width: 16px;
    height: 16px;
    transition: transform 0.25s ease;
}

.filter-pill:hover {
    background: rgba(0, 119, 252, 0.05);
    border-color: rgba(0, 119, 252, 0.3);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.filter-pill.active {
    background: #0077fc;
    color: #ffffff !important;
    border-color: #0077fc;
    box-shadow: 0 6px 20px rgba(0, 119, 252, 0.35);
}

.filter-pill.active svg {
    color: #ffffff;
    transform: scale(1.1);
}

.handbook-section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 700;
    color: #0077fc;
    background: rgba(0, 119, 252, 0.06);
    border: 1px solid rgba(0, 119, 252, 0.15);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    margin-bottom: 0.5rem;
}

/* Programs Grid & Cards */
.programs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.program-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 320px;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
}

.program-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 100% 100%, var(--accent-glow), transparent 60%);
    opacity: 0;
    transition: var(--transition-smooth);
}

.program-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent);
    background: var(--card-hover);
    box-shadow: 0 12px 30px rgba(0, 119, 252, 0.08);
}

.program-card:hover::after {
    opacity: 1;
}

.card-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 2rem;
    z-index: 1;
}

.card-number {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 600;
}

.program-card:hover .card-number {
    color: var(--accent);
}

.card-icon {
    color: var(--text-muted);
    width: 20px;
    height: 20px;
    transition: var(--transition-smooth);
}

.program-card:hover .card-icon {
    color: var(--text-primary);
    transform: rotate(45deg);
}

.card-content {
    margin-bottom: 2rem;
    z-index: 1;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 0.75rem;
    letter-spacing: -0.01em;
}

.card-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 400;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-footer {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    z-index: 1;
}

.tag {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-secondary);
    background: rgba(0, 0, 0, 0.03);
    border: 1px solid var(--border-color);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
}

.program-card:hover .tag {
    border-color: rgba(0, 119, 252, 0.3);
}

/* Coming Soon Card Custom Styling */
.card-locked {
    border-style: dashed;
    border-color: var(--text-muted);
    background: rgba(0, 0, 0, 0.01);
    cursor: default;
}

.card-locked:hover {
    transform: none;
    border-color: var(--text-muted);
    background: rgba(0, 0, 0, 0.01);
    box-shadow: none;
}

.card-locked:hover .card-icon {
    transform: none;
    color: var(--text-muted);
}

.card-locked:hover::after {
    display: none;
}

.card-locked .card-title {
    color: var(--text-secondary);
}

/* Footer styling */
.footer {
    padding: 4rem 0;
    border-top: 1px solid var(--border-color);
    background: #fafafa;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    flex-wrap: wrap;
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.footer-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    color: var(--text-secondary);
}

.status-indicator {
    width: 6px;
    height: 6px;
    background: #34c759;
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 8px #34c759;
}

/* Modal Overlay & Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(12px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

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

.modal-container {
    background: #ffffff;
    border: 1px solid var(--border-color);
    width: 90%;
    max-width: 900px;
    max-height: 85vh;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    transform: scale(0.95) translateY(20px);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.15), 0 0 1px var(--accent);
    overflow: hidden;
}

.modal-overlay.active .modal-container {
    transform: scale(1) translateY(0);
}

.modal-header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.modal-number {
    font-family: var(--font-mono);
    color: var(--accent);
    font-size: 1.25rem;
    font-weight: 700;
    border-right: 1px solid var(--border-color);
    padding-right: 1rem;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

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

.btn-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-close:hover {
    background: rgba(0, 0, 0, 0.05);
    color: var(--text-primary);
}

.modal-info-bar {
    background: rgba(0, 0, 0, 0.01);
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.modal-tags {
    display: flex;
    gap: 0.5rem;
}

.btn-copy {
    background: rgba(0, 119, 252, 0.08);
    color: var(--accent);
    border: 1px solid rgba(0, 119, 252, 0.15);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-smooth);
}

.btn-copy:hover {
    background: var(--accent);
    color: white;
    box-shadow: 0 4px 15px rgba(0, 119, 252, 0.2);
}

.btn-copy.copied {
    background: #34c759;
    color: white;
    border-color: #34c759;
    box-shadow: 0 4px 15px rgba(52, 199, 89, 0.2);
}

.modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    background: #fafafa;
}

/* Custom Editor Code Layout */
.code-wrapper {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

pre[class*="language-"] {
    margin: 0 !important;
    padding: 1.5rem !important;
    background: #ffffff !important;
    border-radius: 0 !important;
}

code[class*="language-"] {
    font-family: var(--font-mono) !important;
    font-size: 0.85rem !important;
    line-height: 1.6 !important;
    color: #1c1c1e !important;
}

/* Prism customization to match White/Black/Blue aesthetics */
.token.comment, .token.prolog, .token.doctype, .token.cdata {
    color: #8e8e93 !important;
    font-style: italic;
}
.token.punctuation {
    color: #3a3a3c !important;
}
.token.property, .token.tag, .token.boolean, .token.number, .token.constant, .token.symbol, .token.deleted {
    color: var(--accent) !important;
    font-weight: 500;
}
.token.selector, .token.attr-name, .token.string, .token.char, .token.builtin, .token.inserted {
    color: #248a3d !important;
}
.token.operator, .token.entity, .token.url, .language-css .token.string, .style .token.string {
    color: #ff9500 !important;
}
.token.atrule, .token.attr-value, .token.keyword {
    color: #ff2d55 !important;
    font-weight: 600;
}
.token.function, .token.class-name {
    color: #af52de !important;
    font-weight: 600;
}
.token.regex, .token.important, .token.variable {
    color: #5856d6 !important;
}

/* Line Numbers Styling */
.line-numbers-rows {
    border-right: 1px solid var(--border-color) !important;
    padding-right: 10px !important;
}
.line-numbers-rows > span:before {
    color: #c7c7cc !important;
}

/* Toast styling */
.toast {
    position: fixed;
    bottom: -100px;
    left: 50%;
    transform: translateX(-50%);
    background: #ffffff;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08), 0 0 1px var(--accent);
    padding: 1rem 2rem;
    border-radius: 100px;
    z-index: 200;
    transition: bottom 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    pointer-events: none;
}

.toast.active {
    bottom: 2rem;
}

.toast-content {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 600;
}

.toast-icon {
    color: #34c759;
    width: 18px;
    height: 18px;
}

/* Responsive adjustment */
@media (max-width: 768px) {
    .container {
        padding: 0 1.5rem;
    }
    .hero {
        padding: 4rem 0;
        min-height: auto;
    }
    .section-header {
        margin-bottom: 2.5rem;
    }
    .programs-grid {
        grid-template-columns: 1fr;
    }
    .modal-container {
        height: 90vh;
        max-height: 90vh;
    }
    .modal-info-bar {
        padding: 1rem;
    }
    .modal-body {
        padding: 1rem;
    }
    .header {
        padding: 1rem 1.5rem;
    }
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
}

/* Multi-code layout styles for Program 5 */
.modal-container.modal-large {
    max-width: 1200px;
}

.multi-code-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.section-full-width {
    width: 100%;
}

.sections-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.code-header-inline {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.code-title-text {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
}

.code-desc-inline {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    line-height: 1.5;
}

.btn-copy-inline {
    background: rgba(0, 119, 252, 0.06);
    color: var(--accent);
    border: 1px solid rgba(0, 119, 252, 0.12);
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    transition: var(--transition-smooth);
}

.btn-copy-inline:hover {
    background: var(--accent);
    color: white;
    box-shadow: 0 4px 12px rgba(0, 119, 252, 0.15);
}

.btn-copy-inline.copied {
    background: #34c759;
    color: white;
    border-color: #34c759;
    box-shadow: 0 4px 12px rgba(52, 199, 89, 0.15);
}

.copy-icon-inline {
    width: 12px;
    height: 12px;
}

/* Responsive adjustment for split container */
@media (max-width: 992px) {
    .sections-split {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}