@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&display=swap');

:root {
    --bg-color: #0d1117;
    --sidebar-bg: rgba(22, 27, 34, 0.85);
    --card-bg: rgba(22, 27, 34, 0.8);
    --border-color: rgba(48, 54, 61, 0.6);
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --accent: #58a6ff;
    --accent-hover: #3182ce;
    --alert-bg: rgba(248, 81, 73, 0.1);
    --alert-border: rgba(248, 81, 73, 0.3);
    --alert-text: #ff7b72;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow: hidden;
}

/* Intro Overlay */
.intro-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(13, 17, 23, 0.85);
    backdrop-filter: blur(25px);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.6s ease, visibility 0.6s;
}

.intro-overlay.hidden {
    opacity: 0;
    visibility: hidden;
}

.intro-content {
    text-align: center;
    background: var(--card-bg);
    padding: 3rem 4rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.intro-title {
    font-size: 2.2rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 0.5rem;
}

.intro-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.intro-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.intro-buttons .lang-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    font-weight: 500;
}

.intro-buttons .lang-btn:hover {
    background: rgba(88, 166, 255, 0.1);
    border-color: var(--accent);
    color: #fff;
    transform: translateY(-2px);
}


/* Ambient Canvas Background */
#ambient-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    filter: blur(80px);
    opacity: 0.6;
}

.app-container {
    display: flex;
    height: 100vh;
    backdrop-filter: blur(20px);
}

/* Sidebar */
.sidebar {
    width: 220px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 1.2rem 0;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 1.2rem 1.5rem;
    font-weight: 600;
    font-size: 1rem;
    color: #fff;
    border-bottom: 1px solid var(--border-color);
}

.brand-icon {
    color: var(--accent);
    width: 20px;
    height: 20px;
}

.nav-menu {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 1.2rem 0.8rem;
}

.nav-section {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 1.5rem;
}

.nav-section-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 4px;
    padding-left: 12px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-smooth);
    text-align: left;
    text-decoration: none;
}

.nav-item:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

.nav-item.active {
    color: #fff;
    background-color: rgba(88, 166, 255, 0.1);
    box-shadow: inset 3px 0 0 var(--accent);
}

.link-item {
    color: var(--text-secondary);
}
.link-item:hover {
    color: var(--accent);
}

.nav-item i {
    width: 16px;
    height: 16px;
}

.sidebar-footer {
    padding: 1.2rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

/* Custom Language Switcher */
.custom-lang-wrapper {
    position: relative;
    user-select: none;
}

.lang-selected {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 0.85rem;
    transition: var(--transition-smooth);
}

.lang-selected:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
}

.lang-left {
    display: flex;
    align-items: center;
    gap: 8px;
}

.lang-icon {
    width: 14px;
    height: 14px;
    color: var(--text-secondary);
}

.chevron {
    width: 14px;
    height: 14px;
    color: var(--text-secondary);
    transition: transform 0.3s ease;
}

.custom-lang-wrapper.open .chevron {
    transform: rotate(180deg);
}

.lang-options {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 0;
    width: 100%;
    background: var(--sidebar-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.2s ease;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}

.custom-lang-wrapper.open .lang-options {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    padding: 10px 12px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-smooth);
}

.lang-option:hover {
    background: rgba(88, 166, 255, 0.1);
    color: var(--accent);
}


.credits {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.credits a {
    color: var(--accent);
    text-decoration: none;
}

/* Main Content Area */
.main-content {
    flex: 1;
    position: relative;
    display: flex;
    flex-direction: column;
}

.view {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    padding: 1.5rem 2rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1), 
                transform 0.4s cubic-bezier(0.4, 0, 0.2, 1),
                visibility 0.4s;
    display: flex;
    flex-direction: column;
}

.view.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.view-header {
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.6rem;
    flex-shrink: 0;
}

.view-header h1 {
    font-size: 1.45rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 0.2rem;
    letter-spacing: -0.5px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.grid-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.2rem;
    flex: 1;
}

.column-left, .column-right {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.2rem;
    backdrop-filter: blur(10px);
}

.compact-card {
    padding: 0.8rem 1rem;
}

.fill-height {
    flex: 1;
}

.card-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.05rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 0.8rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.6rem;
}

.card-title i {
    color: var(--accent);
    width: 16px;
    height: 16px;
}

.steps-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.compact-list li {
    font-size: 0.9rem;
    color: var(--text-primary);
}

.steps-list.numbered {
    counter-reset: step;
}

.steps-list.numbered li {
    position: relative;
    padding-left: 1.8rem;
}

.steps-list.numbered li::before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    background: var(--border-color);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 600;
}

.mt-3 {
    margin-top: 0.8rem;
}

.link {
    color: var(--accent);
    text-decoration: none;
}

.link:hover {
    text-decoration: underline;
}

/* Images */
.guide-image {
    width: 100%;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    margin-top: 0.8rem;
    opacity: 0.95;
    transition: var(--transition-smooth);
}

.guide-image:hover {
    opacity: 1;
    border-color: var(--accent);
}

.stlink-img {
    max-height: 180px;
    object-fit: contain;
    background: rgba(0, 0, 0, 0.2);
    padding: 0.5rem;
}

.cli-img {
    max-height: 250px;
    object-fit: contain;
    margin-top: 1rem;
    background: rgba(0, 0, 0, 0.4);
    padding: 0.5rem;
}

/* Alert Box */
.alert-card {
    display: flex;
    gap: 1rem;
    background: var(--alert-bg);
    border-color: var(--alert-border);
}

.alert-icon i {
    color: var(--alert-text);
    width: 20px;
    height: 20px;
}

.alert-content h3 {
    color: var(--alert-text);
    margin-bottom: 0.3rem;
    font-weight: 600;
    font-size: 0.95rem;
}

.compact-text {
    font-size: 0.85rem;
    color: var(--text-primary);
}

/* Support Grid */
.support-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
}

.support-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.2rem;
    text-decoration: none;
    color: inherit;
    transition: var(--transition-smooth);
    backdrop-filter: blur(10px);
}

.support-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.discord-icon {
    width: 40px;
    height: 40px;
    background: rgba(88, 101, 242, 0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #5865F2;
}

.support-info h3 {
    font-size: 1rem;
    color: #fff;
    margin-bottom: 2px;
}

.support-info p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.external-icon {
    margin-left: auto;
    color: var(--text-secondary);
    width: 16px;
    height: 16px;
}