/* ===== TNHEC — The Natural History of Engineering & Computing ===== */
/* Maximalist botanical-tech aesthetic, horizontal scroll */

@import url('https://fonts.googleapis.com/css2?family=Merriweather:wght@400;700;900&family=Lora:ital,wght@0,400;0,600;1,400&family=Inter:wght@400;500&display=swap');

/* ===== Reset & Base ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    overflow: hidden;
    background: #0d1a0d;
    color: #f0e8d0;
    font-family: 'Lora', Georgia, serif;
    font-size: 16px;
    line-height: 1.7;
}

.svg-defs {
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
}

/* ===== Navigation Ribbon ===== */
.nav-ribbon {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 40px;
    background: linear-gradient(180deg, rgba(13,26,13,0.95) 0%, rgba(13,26,13,0.8) 100%);
    border-bottom: 2px solid #c4a030;
    backdrop-filter: blur(8px);
}

.nav-logo {
    font-family: 'Merriweather', serif;
    font-weight: 900;
    font-size: 24px;
    color: #c4a030;
    letter-spacing: 4px;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-family: 'Inter', sans-serif;
    font-size: 13px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: #a8d4a8;
    cursor: pointer;
    transition: color 0.3s, border-bottom 0.3s;
    padding-bottom: 4px;
    border-bottom: 2px solid transparent;
}

.nav-link:hover,
.nav-link.active {
    color: #c4a030;
    border-bottom-color: #c4a030;
}

.nav-indicator {
    font-family: 'Inter', sans-serif;
    font-size: 12px;
    color: #a8d4a8;
    letter-spacing: 2px;
}

/* ===== Horizontal Scroll Container ===== */
.h-scroll-container {
    display: flex;
    flex-flow: row nowrap;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x mandatory;
    height: 100vh;
    scrollbar-width: none;
}

.h-scroll-container::-webkit-scrollbar {
    display: none;
}

/* ===== Panel Base ===== */
.panel {
    min-width: 100vw;
    height: 100vh;
    scroll-snap-align: start;
    position: relative;
    display: flex;
    flex-direction: column;
    padding-top: 60px;
}

.panel-home { background: #0d1a0d; }
.panel-tutorials { background: #1a3a1a; }
.panel-resources { background: #0d1a0d; }
.panel-projects { background: #1a3a1a; }
.panel-about { background: #0d1a0d; }

/* ===== Botanical Borders ===== */
.botanical-border {
    width: 100%;
    height: 60px;
    overflow: hidden;
    flex-shrink: 0;
    opacity: 0.7;
}

.botanical-border svg {
    display: block;
    min-width: 1000px;
}

/* ===== Panel Grid ===== */
.panel-grid {
    flex: 1;
    display: grid;
    padding: 30px 60px;
    gap: 24px;
    overflow-y: auto;
}

/* ===== Hero Panel ===== */
.panel-home .panel-grid {
    grid-template-columns: 1.5fr 1fr;
    grid-template-rows: 1fr auto;
    align-items: center;
}

.hero-main {
    grid-column: 1;
    grid-row: 1;
}

.hero-title {
    font-family: 'Merriweather', serif;
    font-weight: 900;
    font-size: 56px;
    line-height: 1.15;
    color: #f0e8d0;
    margin-bottom: 24px;
}

.gold-accent {
    color: #c4a030;
}

.hero-subtitle {
    font-family: 'Lora', serif;
    font-size: 18px;
    color: #a8d4a8;
    max-width: 560px;
    margin-bottom: 32px;
}

.cta-btn {
    font-family: 'Merriweather', serif;
    font-weight: 700;
    font-size: 16px;
    padding: 14px 36px;
    background: #c4a030;
    color: #0d1a0d;
    border: none;
    cursor: pointer;
    transition: background 0.3s, transform 0.2s;
}

.cta-btn:hover {
    background: #d4b040;
    transform: translateY(-2px);
}

.cta-btn .arrow {
    display: inline-block;
    transition: transform 0.3s;
}

.cta-btn:hover .arrow {
    transform: translateX(4px);
}

.hero-sidebar {
    grid-column: 2;
    grid-row: 1;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.sidebar-card {
    background: rgba(26,58,26,0.6);
    border: 1px solid #2d5a2d;
    padding: 20px;
    transition: border-color 0.3s, transform 0.2s;
}

.sidebar-card:hover {
    border-color: #c4a030;
    transform: translateX(-4px);
}

.sidebar-card h3 {
    font-family: 'Inter', sans-serif;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: #c4a030;
    margin-bottom: 8px;
}

.sidebar-card .card-title {
    font-family: 'Merriweather', serif;
    font-weight: 700;
    font-size: 16px;
    color: #f0e8d0;
    margin-bottom: 6px;
}

.sidebar-card .card-meta {
    font-family: 'Georgia', serif;
    font-style: italic;
    font-size: 13px;
    color: #a8d4a8;
}

.hero-footer-ribbon {
    grid-column: 1 / -1;
    display: flex;
    gap: 16px;
    justify-content: center;
    font-family: 'Inter', sans-serif;
    font-size: 12px;
    color: #a8d4a8;
    letter-spacing: 1px;
    text-transform: uppercase;
    padding: 12px 0;
    border-top: 1px solid #2d5a2d;
}

/* ===== Tutorials Panel ===== */
.tutorials-grid {
    grid-template-columns: 1fr 240px;
    grid-template-rows: auto 1fr;
}

.panel-header {
    grid-column: 1 / -1;
}

.section-title {
    font-family: 'Merriweather', serif;
    font-weight: 900;
    font-size: 42px;
    color: #c4a030;
    margin-bottom: 8px;
}

.section-desc {
    font-family: 'Lora', serif;
    font-size: 16px;
    color: #a8d4a8;
    max-width: 700px;
}

.tutorial-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.tutorial-card {
    background: rgba(13,26,13,0.7);
    border: 1px solid #2d5a2d;
    padding: 24px;
    transition: border-color 0.3s, transform 0.2s;
    display: flex;
    flex-direction: column;
}

.tutorial-card:hover {
    border-color: #c4a030;
    transform: translateY(-3px);
}

.card-number {
    font-family: 'Georgia', serif;
    font-size: 28px;
    color: #c4a030;
    margin-bottom: 12px;
    font-style: italic;
}

.tutorial-card h3 {
    font-family: 'Merriweather', serif;
    font-weight: 700;
    font-size: 18px;
    color: #f0e8d0;
    margin-bottom: 10px;
}

.tutorial-card p {
    font-size: 14px;
    color: #a8d4a8;
    flex: 1;
    margin-bottom: 12px;
}

.card-tags {
    display: flex;
    gap: 8px;
    margin-bottom: 10px;
}

.tag {
    font-family: 'Inter', sans-serif;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 3px 10px;
    border: 1px solid #8b4513;
    color: #c4a030;
}

.card-footer {
    font-family: 'Inter', sans-serif;
    font-size: 12px;
    color: #a8d4a8;
    border-top: 1px solid #2d5a2d;
    padding-top: 10px;
}

.panel-sidebar {
    grid-row: 2;
}

.sidebar-block {
    margin-bottom: 24px;
}

.sidebar-block h4 {
    font-family: 'Merriweather', serif;
    font-weight: 700;
    font-size: 14px;
    color: #c4a030;
    margin-bottom: 12px;
}

.difficulty-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.diff-label {
    font-family: 'Inter', sans-serif;
    font-size: 11px;
    color: #a8d4a8;
    width: 80px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.diff-fill {
    height: 8px;
    background: linear-gradient(90deg, #2d5a2d, #c4a030);
    display: block;
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

/* ===== Resources Panel ===== */
.resources-grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr auto;
}

.resource-columns {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.col-heading {
    font-family: 'Merriweather', serif;
    font-weight: 700;
    font-size: 20px;
    color: #c4a030;
    margin-bottom: 20px;
    padding-bottom: 8px;
    border-bottom: 2px solid #8b4513;
}

.resource-item {
    display: flex;
    gap: 14px;
    margin-bottom: 20px;
    padding: 14px;
    border: 1px solid transparent;
    transition: border-color 0.3s, background 0.3s;
}

.resource-item:hover {
    border-color: #2d5a2d;
    background: rgba(26,58,26,0.3);
}

.resource-icon {
    font-size: 20px;
    color: #c4a030;
    flex-shrink: 0;
    margin-top: 2px;
}

.resource-item h4 {
    font-family: 'Merriweather', serif;
    font-weight: 700;
    font-size: 15px;
    color: #f0e8d0;
    margin-bottom: 4px;
}

.resource-item p {
    font-size: 13px;
    color: #a8d4a8;
}

.pull-quote {
    text-align: center;
    padding: 30px 60px;
    position: relative;
}

.quote-mark {
    font-family: 'Georgia', serif;
    font-size: 72px;
    color: #c4a030;
    line-height: 0.5;
    display: block;
    margin-bottom: 10px;
}

.pull-quote p {
    font-family: 'Georgia', serif;
    font-size: 22px;
    font-style: italic;
    color: #f0e8d0;
    max-width: 700px;
    margin: 0 auto 12px;
}

.quote-attr {
    font-family: 'Inter', sans-serif;
    font-size: 12px;
    color: #a8d4a8;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* ===== Projects Panel ===== */
.projects-grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
}

.project-showcase {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 20px;
}

.project-card {
    background: rgba(13,26,13,0.7);
    border: 1px solid #2d5a2d;
    padding: 24px;
    transition: border-color 0.3s, transform 0.2s;
}

.project-card:hover {
    border-color: #c4a030;
    transform: scale(1.01);
}

.project-card.featured {
    grid-row: 1 / 3;
    border-color: #8b4513;
    background: rgba(13,26,13,0.9);
}

.project-badge {
    display: inline-block;
    font-family: 'Inter', sans-serif;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 2px;
    padding: 4px 12px;
    background: #8b4513;
    color: #f0e8d0;
    margin-bottom: 16px;
}

.project-card h3 {
    font-family: 'Merriweather', serif;
    font-weight: 700;
    font-size: 22px;
    color: #f0e8d0;
    margin-bottom: 12px;
}

.project-card p {
    font-size: 14px;
    color: #a8d4a8;
    margin-bottom: 16px;
}

.project-meta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.meta-item {
    font-family: 'Inter', sans-serif;
    font-size: 12px;
    color: #c4a030;
    padding: 3px 10px;
    border: 1px solid #2d5a2d;
}

.project-diagram {
    margin-top: 20px;
}

.project-diagram svg {
    max-width: 100%;
    height: auto;
}

/* ===== About Panel ===== */
.about-grid {
    grid-template-columns: 1.5fr 1fr;
    grid-template-rows: 1fr auto;
}

.about-main {
    grid-column: 1;
    grid-row: 1;
}

.about-text {
    font-size: 16px;
    color: #a8d4a8;
    margin-bottom: 20px;
    max-width: 600px;
}

.about-stats {
    display: flex;
    gap: 40px;
    margin-top: 30px;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-family: 'Merriweather', serif;
    font-weight: 900;
    font-size: 42px;
    color: #c4a030;
}

.stat-label {
    font-family: 'Inter', sans-serif;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: #a8d4a8;
}

.about-sidebar {
    grid-column: 2;
    grid-row: 1;
}

.contact-card {
    background: rgba(26,58,26,0.5);
    border: 1px solid #2d5a2d;
    padding: 28px;
}

.contact-card h3 {
    font-family: 'Merriweather', serif;
    font-weight: 700;
    font-size: 20px;
    color: #c4a030;
    margin-bottom: 20px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.form-input {
    font-family: 'Lora', serif;
    font-size: 14px;
    padding: 12px 16px;
    background: rgba(13,26,13,0.8);
    border: 1px solid #2d5a2d;
    color: #f0e8d0;
    transition: border-color 0.3s;
}

.form-input::placeholder {
    color: #a8d4a8;
    opacity: 0.6;
}

.form-input:focus {
    outline: none;
    border-color: #c4a030;
}

.form-textarea {
    min-height: 100px;
    resize: vertical;
}

.submit-btn {
    font-family: 'Merriweather', serif;
    font-weight: 700;
    font-size: 14px;
    padding: 12px 24px;
    background: #c4a030;
    color: #0d1a0d;
    border: none;
    cursor: pointer;
    transition: background 0.3s;
}

.submit-btn:hover {
    background: #d4b040;
}

.error-message {
    font-family: 'Inter', sans-serif;
    font-size: 13px;
    color: #c4a030;
    background: rgba(139,69,19,0.3);
    border: 1px solid #8b4513;
    padding: 10px 14px;
    margin-top: 10px;
}

/* Shake animation for error */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-4px); }
    20%, 40%, 60%, 80% { transform: translateX(4px); }
}

.shake {
    animation: shake 0.5s ease-in-out;
}

.about-footer {
    grid-column: 1 / -1;
    text-align: center;
    padding: 16px 0;
    border-top: 1px solid #2d5a2d;
    font-family: 'Inter', sans-serif;
    font-size: 12px;
    color: #a8d4a8;
}

.footer-botanical {
    font-family: 'Georgia', serif;
    font-style: italic;
    font-size: 13px;
    color: #c4a030;
    margin-top: 4px;
}

/* ===== Scroll Arrows ===== */
.scroll-arrows {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 16px;
    z-index: 100;
}

.scroll-arrow {
    width: 50px;
    height: 50px;
    background: rgba(13,26,13,0.85);
    border: 2px solid #c4a030;
    color: #c4a030;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s, transform 0.2s;
}

.scroll-arrow:hover {
    background: #c4a030;
    color: #0d1a0d;
    transform: scale(1.1);
}

.scroll-arrow:disabled {
    opacity: 0.3;
    cursor: default;
    transform: none;
}

.scroll-arrow:disabled:hover {
    background: rgba(13,26,13,0.85);
    color: #c4a030;
}

/* ===== Panel Entry Animations ===== */
.panel .panel-grid > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.panel.visible .panel-grid > * {
    opacity: 1;
    transform: translateY(0);
}

.panel.visible .panel-grid > *:nth-child(1) { transition-delay: 0.1s; }
.panel.visible .panel-grid > *:nth-child(2) { transition-delay: 0.2s; }
.panel.visible .panel-grid > *:nth-child(3) { transition-delay: 0.3s; }
.panel.visible .panel-grid > *:nth-child(4) { transition-delay: 0.4s; }

/* ===== Scrollbar for inner overflow ===== */
.panel-grid::-webkit-scrollbar {
    width: 6px;
}

.panel-grid::-webkit-scrollbar-track {
    background: #0d1a0d;
}

.panel-grid::-webkit-scrollbar-thumb {
    background: #2d5a2d;
}

.panel-grid::-webkit-scrollbar-thumb:hover {
    background: #c4a030;
}