:root {
    /* Light Mode (Workbench/Paper) */
    --bg-color: #f5f5f5;
    --surface-color: #ffffff;
    --text-color: #2c3e50;
    --text-muted: #7f8c8d;
    --accent-primary: #e67e22;
    /* Safety Orange */
    --accent-secondary: #3498db;
    /* Blueprint Blue */
    --grid-line: rgba(0, 0, 0, 0.05);
    --border-color: #dcdde1;
    --nav-bg: rgba(255, 255, 255, 0.95);

    /* Global tokens */
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'Fira Code', 'Courier New', monospace;
    --transition-speed: 0.3s;
}

[data-theme="dark"] {
    /* Dark Mode (Dark Slate/Toolbox) */
    --bg-color: #1a1a1b;
    --surface-color: #242526;
    --text-color: #e4e6eb;
    --text-muted: #b0b3b8;
    --accent-primary: #f39c12;
    /* Brighter Orange */
    --accent-secondary: #5dade2;
    /* Lighter Blue */
    --grid-line: rgba(255, 255, 255, 0.05);
    --border-color: #3e4042;
    --nav-bg: rgba(36, 37, 38, 0.95);
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color var(--transition-speed), color var(--transition-speed);
    overflow-x: hidden;
}

/* Workbench Grid Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(var(--grid-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: -1;
    pointer-events: none;
}

/* Blueprint Accents */
.blueprint-line {
    border: 1px dashed var(--accent-secondary);
    position: relative;
}

.blueprint-line::before {
    content: attr(data-label);
    position: absolute;
    top: -10px;
    left: 10px;
    background: var(--bg-color);
    padding: 0 5px;
    font-size: 0.7rem;
    font-family: var(--font-mono);
    color: var(--accent-secondary);
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

/* Layout Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.logo {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.2rem;
    cursor: pointer;
    user-select: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo span {
    color: var(--accent-primary);
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 20px;
}

/* Desktop Navigation */
.desktop-nav {
    display: flex;
    gap: 30px;
}

.desktop-nav ul {
    display: flex;
    gap: 20px;
}

.desktop-nav ul li a {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 5px 10px;
    transition: all 0.2s;
    border: 1px solid transparent;
}

.desktop-nav ul li a:hover {
    color: var(--accent-primary);
    border: 1px dashed var(--accent-primary);
    background: rgba(230, 126, 34, 0.05);
}

@media (max-width: 992px) {
    .desktop-nav {
        display: none;
    }
}

/* Theme Toggle Button */
#theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    transition: all var(--transition-speed);
}

#theme-toggle:hover {
    background: var(--border-color);
}

#theme-toggle svg {
    width: 20px;
    height: 20px;
    fill: var(--text-color);
}

/* Hamburger Menu Icon */
.hamburger {
    width: 30px;
    height: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    cursor: pointer;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--text-color);
    transition: all 0.3s ease;
}

/* Sections */
.section {
    padding: 100px 0;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 30px;
    font-weight: 800;
}

/* Hero Section */
.hero {
    height: 90vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 70px;
    /* Offset for fixed header */
    margin: 20px;
    border: 2px solid var(--border-color);
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('../assets/images/workbench.png');
    background-size: cover;
    background-position: center;
    color: white;
}

[data-theme="light"] .hero {
    background: linear-gradient(rgba(255, 255, 255, 0.8), rgba(255, 255, 255, 0.8)), url('../assets/images/workbench.png');
    background-size: cover;
    background-position: center;
    color: var(--text-color);
}

.workbench-mat {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-radius: 4px;
}

/* Full Month Calendar Grid */
.calendar-grid-wrapper {
    margin-top: 30px;
    border: 1px solid var(--border-color);
    background: var(--surface-color);
    border-radius: 4px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.calendar-days-header {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
}

.day-name {
    padding: 15px 5px;
    text-align: center;
    font-weight: 700;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
}

.calendar-date {
    min-height: 100px;
    padding: 10px;
    border-right: 1px solid var(--grid-line);
    border-bottom: 1px solid var(--grid-line);
    position: relative;
    transition: background 0.2s;
    background: var(--surface-color);
}

.calendar-date:nth-child(7n) {
    border-right: none;
}

.calendar-date.other-month {
    background: var(--bg-color);
    opacity: 0.5;
}

.calendar-date:hover {
    background: var(--bg-color);
}

.calendar-date.today {
    background: rgba(230, 126, 34, 0.05);
}

.calendar-date.today .date-num {
    color: var(--accent-primary);
    border-bottom: 2px solid var(--accent-primary);
}

.date-num {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 700;
    display: inline-block;
    margin-bottom: 5px;
}

.calendar-events {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.calendar-event {
    padding: 4px 6px;
    background: var(--accent-primary);
    color: white;
    font-size: 0.6rem;
    border-radius: 2px;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1;
}

.calendar-event.secondary {
    background: var(--accent-secondary);
}

@media (max-width: 768px) {
    .calendar-date {
        min-height: 80px;
    }

    .day-name {
        font-size: 0.6rem;
        padding: 10px 2px;
    }
}

.hero-content {
    max-width: 800px;
}

.hero-title {
    font-size: 4rem;
    line-height: 1.1;
    margin-top: 10px;
}

.hero-title span {
    color: var(--accent-primary);
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin: 30px 0;
}

.hero-cta {
    display: flex;
    gap: 20px;
}

/* Buttons */
.btn {
    padding: 12px 30px;
    border-radius: 4px;
    font-weight: 700;
    transition: all 0.2s;
    display: inline-block;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-primary {
    background: var(--accent-primary);
    color: white;
}

.btn-primary:hover {
    background: #d35400;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(230, 126, 34, 0.4);
}

.btn-secondary {
    border: 2px solid var(--accent-secondary);
    color: var(--accent-secondary);
}

.btn-secondary:hover {
    background: var(--accent-secondary);
    color: white;
    transform: translateY(-2px);
}

/* Blueprint Visualization */
.grid-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.placeholder-box {
    width: 100%;
    aspect-ratio: 16/9;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* Screws Decor */
.screw-head {
    position: absolute;
    width: 20px;
    height: 20px;
    background: #bdc3c7;
    border-radius: 50%;
    box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    transition: transform 0.3s;
}

.screw-head::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 12px;
    height: 2px;
    background: rgba(0, 0, 0, 0.2);
}

.screw-head::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(90deg);
    width: 12px;
    height: 2px;
    background: rgba(0, 0, 0, 0.2);
}

.top-left {
    top: 10px;
    left: 10px;
}

.top-right {
    top: 10px;
    right: 10px;
}

.bottom-left {
    bottom: 10px;
    left: 10px;
}

.bottom-right {
    bottom: 10px;
    right: 10px;
}

/* Footer */
footer {
    background: var(--surface-color);
    border-top: 1px solid var(--border-color);
    padding: 80px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-brand h3 {
    margin-bottom: 15px;
    color: var(--accent-primary);
}

.footer-links h4,
.footer-social h4 {
    margin-bottom: 20px;
    font-size: 0.9rem;
    text-transform: uppercase;
    color: var(--text-muted);
}

.footer-links ul li,
.footer-social ul li {
    margin-bottom: 10px;
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid var(--border-color);
    padding-top: 40px;
    color: var(--text-muted);
}

/* Responsive */
@media (max-width: 768px) {
    .grid-layout {
        grid-template-columns: 1fr;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    header {
        padding: 0 20px;
    }

    .nav-menu {
        width: 100%;
    }
}

/* Full Screen Menu & Navigation Extras */
.nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background: var(--surface-color);
    display: flex;
    flex-direction: column;
    padding: 100px 40px;
    transition: right 0.4s cubic-bezier(0.7, 0, 0.3, 1);
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.nav-menu.active {
    right: 0;
}

.nav-menu ul li {
    margin-bottom: 25px;
}

.nav-menu ul li a {
    font-size: 1.5rem;
    font-weight: 600;
    transition: color 0.2s;
}

.nav-menu ul li a:hover {
    color: var(--accent-primary);
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s;
    z-index: 999;
}

.overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Inner Pages Style Bundle */
.hero-small {
    height: 40vh;
    padding-top: 100px;
    margin: 20px;
    border: 2px solid var(--border-color);
    background-color: var(--surface-color);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero-small h1 {
    font-size: 3rem;
    font-family: var(--font-mono);
}

.inner-content {
    padding: 60px 0 100px;
}

/* Schedule / Calendar */
.calendar-mock {
    border: 1px solid var(--border-color);
    padding: 20px;
    background: var(--surface-color);
    border-radius: 8px;
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.event-box {
    padding: 15px;
    border-left: 4px solid var(--accent-primary);
    background: var(--bg-color);
    margin-bottom: 15px;
    transition: transform 0.2s;
}

.event-box:hover {
    transform: translateX(10px);
}

/* Forum */
.forum-thread {
    padding: 20px;
    border: 1px solid var(--border-color);
    background: var(--surface-color);
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Booking Forms */
.booking-form {
    max-width: 600px;
    margin: 0 auto;
    background: var(--surface-color);
    padding: 40px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    font-family: var(--font-mono);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    background: var(--bg-color);
    color: var(--text-color);
    border-radius: 4px;
}

/* Forum Thread Detail */
.thread-container {
    max-width: 900px;
    margin: 0 auto;
}

.post-block {
    display: flex;
    gap: 20px;
    padding: 25px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.post-block.original-post {
    border-top: 4px solid var(--accent-primary);
}

.user-avatar {
    width: 50px;
    height: 50px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-weight: bold;
    color: var(--accent-secondary);
    flex-shrink: 0;
}

.post-body {
    flex-grow: 1;
}

.post-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    border-bottom: 1px dashed var(--border-color);
    padding-bottom: 5px;
}

.post-user {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.9rem;
}

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

.post-text {
    line-height: 1.6;
}

.post-actions {
    margin-top: 15px;
    display: flex;
    gap: 15px;
}

.post-actions a {
    font-size: 0.8rem;
    color: var(--accent-secondary);
    font-family: var(--font-mono);
}

.reply-box {
    margin-top: 40px;
    padding: 25px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
}
/* Bulletin Board / Sticky Notes */
.bulletin-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 30px;
    padding: 40px;
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    min-height: 600px;
    position: relative;
    margin: 20px;
}

.sticky-note {
    background: #fff3a3;
    aspect-ratio: 1/1;
    padding: 20px;
    box-shadow: 5px 5px 10px rgba(0,0,0,0.1);
    transform: rotate(-1deg);
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    color: #444;
}

.sticky-note:nth-child(even) { transform: rotate(2deg); background: #d4f1f9; }
.sticky-note:nth-child(3n) { transform: rotate(-2deg); background: #ffccff; }

.sticky-note:hover {
    transform: scale(1.05) rotate(0deg);
    box-shadow: 10px 10px 20px rgba(0,0,0,0.15);
    z-index: 10;
}

.sticky-note .note-content { font-family: 'Inter', sans-serif; font-size: 0.9rem; line-height: 1.4; overflow-y: auto; }
.sticky-note .note-footer { display: flex; justify-content: space-between; align-items: flex-end; font-size: 0.7rem; font-family: var(--font-mono); border-top: 1px dashed rgba(0,0,0,0.1); padding-top: 10px; margin-top: 10px; }
.sticky-note .delete-note { position: absolute; top: 5px; right: 5px; color: #e74c3c; cursor: pointer; opacity: 0; transition: opacity 0.2s; background: none; border: none; font-size: 1.2rem; }
.sticky-note:hover .delete-note { opacity: 1; }

/* Forum Tags & Search */
.tag-bar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 30px; padding: 15px; background: var(--surface-color); border: 1px dashed var(--accent-secondary); }
.tag-chip { padding: 5px 15px; background: var(--bg-color); border: 1px solid var(--border-color); border-radius: 20px; font-size: 0.8rem; font-family: var(--font-mono); cursor: pointer; transition: all 0.2s; }
.tag-chip:hover, .tag-chip.active { background: var(--accent-primary); color: white; border-color: var(--accent-primary); }
.forum-search-bar { margin-bottom: 20px; width: 100% }
.forum-search-bar input { width: 100%; padding: 15px; font-family: var(--font-mono); background: var(--surface-color); border: 2px solid var(--border-color); border-radius: 4px; }

/* Public Profile Styling */
.profile-header {
    text-align: center;
    padding: 40px 20px;
    border-bottom: 2px solid var(--border-color);
    background: var(--surface-color);
    margin: 20px;
}

.profile-header h1 {
    font-family: var(--font-mono);
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: var(--accent-primary);
}

.profile-section {
    padding: 30px 20px;
    margin: 20px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
}

.profile-section h2 {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--accent-primary);
    border-bottom: 1px dashed var(--border-color);
    padding-bottom: 10px;
}

.stat-list {
    list-style: none;
    font-family: var(--font-mono);
    padding: 0;
}

.stat-list li {
    padding: 12px 0;
    border-bottom: 1px dashed var(--border-color);
}

.stat-list li:last-child {
    border-bottom: none;
}

/* Clickable Usernames */
.username-link {
    color: var(--accent-primary);
    font-weight: 600;
    text-decoration: none;
    transition: opacity 0.2s;
    font-family: var(--font-mono);
}

.username-link:hover {
    opacity: 0.7;
    text-decoration: underline;
}