/* ══════════════════════════════════════════════
   Java Sinhala Tutorial  –  style.css  v2.0
   ══════════════════════════════════════════════ */


/* ─── Google Fonts are loaded via <link> in each page ─── */


/* ─── Custom Properties ─── */

:root {
    --bg: #080c18;
    --bg2: #0d1120;
    --bg3: #111826;
    --card: #0f1522;
    --card2: #162035;
    --border: #1c2b47;
    --border2: #263d64;
    --accent: #f59e0b;
    --accent2: #fbbf24;
    --accent-glow: rgba(245, 158, 11, .25);
    --blue: #3b82f6;
    --blue2: #60a5fa;
    --green: #10b981;
    --green2: #34d399;
    --red: #ef4444;
    --red2: #f87171;
    --purple: #8b5cf6;
    --cyan: #06b6d4;
    --text: #e2e8f0;
    --text2: #94a3b8;
    --text3: #4b5d78;
    --java-orange: #f89820;
    --java-blue: #5382a1;
    --editor-bg: #1e1e2e;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, .55);
    --shadow-glow: 0 0 40px rgba(245, 158, 11, .18);
    --transition: all .2s ease;
}


/* ─── Reset & Base ─── */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Space Grotesk', 'Noto Sans Sinhala', sans-serif;
    background: var(--bg);
    color: var(--text);
    overflow-x: hidden;
    line-height: 1.7;
}

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

img {
    display: block;
    max-width: 100%;
}

button,
input,
select,
textarea {
    font-family: inherit;
}


/* ─── Scrollbar ─── */

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg2);
}

::-webkit-scrollbar-thumb {
    background: var(--border2);
    border-radius: 3px;
}


/* ══════════════════════════════════════════════
   HEADER / NAV
   ══════════════════════════════════════════════ */

.site-header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 200;
    background: rgba(8, 12, 24, .88);
    backdrop-filter: blur(22px) saturate(1.4);
    border-bottom: 1px solid var(--border);
}

.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent);
}

.logo-icon {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, var(--java-orange), var(--java-blue));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 900;
    color: #fff;
    font-family: 'JetBrains Mono', monospace;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.main-nav a {
    padding: 6px 13px;
    border-radius: 8px;
    color: var(--text2);
    font-size: .84rem;
    font-weight: 500;
    transition: var(--transition);
}

.main-nav a:hover {
    background: var(--card2);
    color: var(--text);
}

.main-nav a.active {
    background: var(--card2);
    color: var(--accent);
}

.nav-auth {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: 16px;
}

.btn-nav-login {
    padding: 6px 16px;
    border-radius: 8px;
    border: 1px solid var(--border2);
    color: var(--text2);
    font-size: .84rem;
    font-weight: 500;
    transition: var(--transition);
    background: transparent;
    cursor: pointer;
}

.btn-nav-login:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-nav-register {
    padding: 6px 16px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--java-orange), #e67e22);
    color: #fff;
    font-size: .84rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn-nav-register:hover {
    opacity: .88;
    transform: translateY(-1px);
}

.user-avatar-sm {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--java-orange), var(--java-blue));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .8rem;
    font-weight: 700;
    color: #fff;
    cursor: pointer;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--card2);
    border: 1px solid var(--border2);
    border-radius: var(--radius-md);
    padding: 6px;
    min-width: 160px;
    display: none;
    z-index: 300;
    box-shadow: var(--shadow-lg);
}

.dropdown:hover .dropdown-menu {
    display: block;
}

.dropdown-menu a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    color: var(--text2);
    font-size: .84rem;
    transition: var(--transition);
}

.dropdown-menu a:hover {
    background: rgba(255, 255, 255, .05);
    color: var(--text);
}

.dropdown {
    position: relative;
}


/* ══════════════════════════════════════════════
   PAGE WRAPPER
   ══════════════════════════════════════════════ */

.page-body {
    padding-top: 65px;
}


/* ══════════════════════════════════════════════
   HERO
   ══════════════════════════════════════════════ */

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 24px 80px;
    position: relative;
    overflow: hidden;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image: linear-gradient(rgba(59, 130, 246, .05) 1px, transparent 1px), linear-gradient(90deg, rgba(59, 130, 246, .05) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black, transparent);
}

.hero-glow {
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 300px;
    background: radial-gradient(ellipse, rgba(248, 152, 32, .15) 0%, transparent 70%);
    pointer-events: none;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(248, 152, 32, .1);
    border: 1px solid rgba(248, 152, 32, .3);
    color: var(--accent);
    padding: 6px 16px;
    border-radius: 100px;
    font-size: .8rem;
    font-weight: 600;
    letter-spacing: .05em;
    margin-bottom: 24px;
    animation: fadeDown .6s ease both;
}

.hero h1 {
    font-size: clamp(2.4rem, 6vw, 4.4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 20px;
    animation: fadeUp .7s .1s both ease;
}

.hero h1 span {
    color: var(--java-orange);
}

.hero h1 em {
    font-style: normal;
    color: var(--blue2);
}

.hero-sub {
    font-size: 1.05rem;
    color: var(--text2);
    max-width: 540px;
    margin-bottom: 40px;
    font-family: 'Noto Sans Sinhala', sans-serif;
    animation: fadeUp .7s .2s both ease;
}

.hero-btns {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
    animation: fadeUp .7s .3s both ease;
}


/* ══════════════════════════════════════════════
   BUTTONS
   ══════════════════════════════════════════════ */

.btn-primary {
    padding: 12px 28px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--java-orange), #e67e22);
    color: #fff;
    font-weight: 600;
    font-size: .95rem;
    cursor: pointer;
    border: none;
    display: inline-block;
    transition: var(--transition);
    box-shadow: 0 0 30px rgba(248, 152, 32, .3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 40px rgba(248, 152, 32, .4);
}

.btn-secondary {
    padding: 12px 28px;
    border-radius: 10px;
    background: var(--card2);
    color: var(--text);
    font-weight: 600;
    font-size: .95rem;
    display: inline-block;
    border: 1px solid var(--border2);
    transition: var(--transition);
    cursor: pointer;
}

.btn-secondary:hover {
    background: var(--border);
}

.btn-danger {
    padding: 8px 18px;
    border-radius: 8px;
    background: rgba(239, 68, 68, .15);
    color: var(--red2);
    border: 1px solid rgba(239, 68, 68, .3);
    font-size: .85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-danger:hover {
    background: rgba(239, 68, 68, .25);
}


/* ══════════════════════════════════════════════
   STATS BAR
   ══════════════════════════════════════════════ */

.stats-bar {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
    padding: 32px 24px;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    background: var(--bg2);
}

.stat {
    text-align: center;
}

.stat-num {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent);
    font-family: 'JetBrains Mono';
}

.stat-label {
    font-size: .78rem;
    color: var(--text3);
    text-transform: uppercase;
    letter-spacing: .08em;
}


/* ══════════════════════════════════════════════
   MAIN LAYOUT (Tutorial page)
   ══════════════════════════════════════════════ */

.main-layout {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 260px 1fr;
    min-height: 100vh;
}


/* Sidebar */

.sidebar {
    position: sticky;
    top: 65px;
    height: calc(100vh - 65px);
    overflow-y: auto;
    padding: 24px 0;
    border-right: 1px solid var(--border);
    background: var(--bg2);
}

.sidebar-section {
    margin-bottom: 8px;
}

.sidebar-title {
    padding: 8px 20px;
    font-size: .64rem;
    font-weight: 700;
    color: var(--text3);
    text-transform: uppercase;
    letter-spacing: .12em;
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 20px;
    cursor: pointer;
    color: var(--text2);
    font-size: .84rem;
    border-left: 2px solid transparent;
    transition: var(--transition);
}

.sidebar-item:hover {
    color: var(--text);
    background: rgba(255, 255, 255, .03);
    border-left-color: var(--border2);
}

.sidebar-item.active {
    color: var(--accent);
    background: rgba(248, 152, 32, .07);
    border-left-color: var(--accent);
}

.sidebar-item .num {
    font-family: 'JetBrains Mono';
    font-size: .68rem;
    color: var(--text3);
    min-width: 20px;
}

.sidebar-progress {
    padding: 16px 20px;
    border-top: 1px solid var(--border);
    margin-top: 8px;
}

.progress-label {
    font-size: .72rem;
    color: var(--text3);
    margin-bottom: 6px;
}

.progress-bar {
    height: 4px;
    background: var(--border);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 4px;
    transition: .4s;
}

.progress-pct {
    font-size: .68rem;
    color: var(--accent);
    font-family: 'JetBrains Mono';
    margin-top: 4px;
}


/* Content */

.content {
    padding: 40px 48px;
}

.section {
    margin-bottom: 80px;
    scroll-margin-top: 80px;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
}

.section-num {
    font-family: 'JetBrains Mono';
    font-size: .74rem;
    color: var(--accent);
    background: rgba(248, 152, 32, .1);
    padding: 4px 10px;
    border-radius: 6px;
    border: 1px solid rgba(248, 152, 32, .2);
}

.section h2 {
    font-size: 1.65rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text), var(--text2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section p,
.section li {
    color: var(--text2);
    font-size: .93rem;
    line-height: 1.8;
}

.section ul {
    margin: 12px 0 12px 20px;
}

.section li {
    margin-bottom: 6px;
}


/* ══════════════════════════════════════════════
   CODE BLOCKS
   ══════════════════════════════════════════════ */

.code-block {
    margin: 20px 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--editor-bg);
    box-shadow: 0 8px 32px rgba(0, 0, 0, .4);
}

.code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    background: rgba(255, 255, 255, .03);
    border-bottom: 1px solid var(--border);
}

.code-dots {
    display: flex;
    gap: 6px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot-r {
    background: #ff5f57;
}

.dot-y {
    background: #febc2e;
}

.dot-g {
    background: #28c840;
}

.code-lang {
    font-family: 'JetBrains Mono';
    font-size: .68rem;
    color: var(--text3);
    background: var(--card2);
    padding: 2px 10px;
    border-radius: 4px;
}

.copy-btn {
    background: none;
    border: 1px solid var(--border);
    color: var(--text3);
    padding: 4px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: .74rem;
    transition: var(--transition);
}

.copy-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

pre {
    padding: 20px;
    overflow-x: auto;
    font-family: 'JetBrains Mono', monospace;
    font-size: .84rem;
    line-height: 1.7;
}

pre code {
    color: var(--text);
}

.kw {
    color: #cba6f7;
    font-weight: 600;
}

.str {
    color: #a6e3a1;
}

.cm {
    color: #6c7086;
    font-style: italic;
}

.nm {
    color: #fab387;
}

.tp {
    color: #89dceb;
}

.fn {
    color: #89b4fa;
}

.cls {
    color: #f9e2af;
}


/* ══════════════════════════════════════════════
   TABLE
   ══════════════════════════════════════════════ */

.table-wrap {
    overflow-x: auto;
    margin: 20px 0;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: var(--card2);
}

th {
    padding: 12px 16px;
    text-align: left;
    font-size: .78rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: .06em;
    white-space: nowrap;
}

td {
    padding: 11px 16px;
    border-top: 1px solid var(--border);
    font-size: .84rem;
    color: var(--text2);
}

td code {
    font-family: 'JetBrains Mono';
    font-size: .78rem;
    background: var(--card2);
    color: var(--cyan);
    padding: 2px 6px;
    border-radius: 4px;
}

tbody tr:hover {
    background: rgba(255, 255, 255, .02);
}

tbody tr:nth-child(even) {
    background: rgba(255, 255, 255, .01);
}


/* ══════════════════════════════════════════════
   CALLOUTS
   ══════════════════════════════════════════════ */

.callout {
    display: flex;
    gap: 14px;
    padding: 16px 20px;
    border-radius: 10px;
    margin: 20px 0;
    border-left: 3px solid;
}

.callout-info {
    background: rgba(59, 130, 246, .08);
    border-color: var(--blue);
}

.callout-tip {
    background: rgba(16, 185, 129, .08);
    border-color: var(--green);
}

.callout-warn {
    background: rgba(245, 158, 11, .08);
    border-color: var(--accent);
}

.callout-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.callout p {
    color: var(--text2);
    font-size: .9rem;
    margin: 0;
}

.callout strong {
    color: var(--text);
}


/* ══════════════════════════════════════════════
   HIGHLIGHT BOX / TWO COL
   ══════════════════════════════════════════════ */

.highlight-box {
    background: var(--card2);
    border: 1px solid var(--border2);
    border-radius: var(--radius-md);
    padding: 20px;
    flex: 1;
}

.highlight-box h4 {
    color: var(--text);
    font-size: .9rem;
    margin-bottom: 10px;
}

.highlight-box ul {
    margin: 0 0 0 16px;
}

.highlight-box li {
    color: var(--text2);
    font-size: .84rem;
    margin-bottom: 4px;
}

.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}


/* ══════════════════════════════════════════════
   ONLINE EDITOR (editor.php)
   ══════════════════════════════════════════════ */

.editor-page {
    padding-top: 65px;
}

.editor-wrapper {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border2);
    box-shadow: var(--shadow-lg);
}

.editor-topbar {
    background: var(--card2);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: stretch;
}

.editor-tabs {
    display: flex;
}

.editor-tab {
    padding: 12px 24px;
    font-size: .84rem;
    font-weight: 500;
    cursor: pointer;
    border-right: 1px solid var(--border);
    color: var(--text3);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 2px solid transparent;
}

.editor-tab.active {
    color: var(--text);
    border-bottom-color: var(--accent);
    background: rgba(255, 255, 255, .03);
}

.editor-tab:hover:not(.active) {
    color: var(--text2);
}

.editor-actions {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
}

.run-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, var(--green), #059669);
    color: #fff;
    border: none;
    padding: 8px 20px;
    border-radius: 8px;
    font-weight: 600;
    font-size: .84rem;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 0 20px rgba(16, 185, 129, .3);
}

.run-btn:hover {
    transform: scale(1.02);
    box-shadow: 0 0 30px rgba(16, 185, 129, .4);
}

.run-btn:active {
    transform: scale(.98);
}

.run-btn.loading {
    opacity: .7;
    cursor: not-allowed;
}

.reset-btn {
    background: var(--card);
    color: var(--text2);
    border: 1px solid var(--border);
    padding: 8px 14px;
    border-radius: 8px;
    cursor: pointer;
    font-size: .78rem;
    transition: var(--transition);
}

.reset-btn:hover {
    border-color: var(--border2);
    color: var(--text);
}

.editor-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 440px;
}

.editor-pane {
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border);
}

.editor-pane-header {
    padding: 8px 16px;
    background: rgba(255, 255, 255, .02);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: .74rem;
    color: var(--text3);
}

.pane-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 6px var(--green);
}

.code-area-wrap {
    flex: 1;
    display: flex;
    overflow: hidden;
    position: relative;
}

.line-nums {
    padding: 16px 12px;
    background: rgba(255, 255, 255, .01);
    border-right: 1px solid var(--border);
    font-family: 'JetBrains Mono';
    font-size: .78rem;
    color: var(--text3);
    text-align: right;
    min-width: 44px;
    line-height: 1.6;
    user-select: none;
    overflow: hidden;
}

#editor-textarea {
    flex: 1;
    padding: 16px;
    resize: none;
    outline: none;
    background: var(--editor-bg);
    color: var(--text);
    font-family: 'JetBrains Mono', monospace;
    font-size: .84rem;
    line-height: 1.6;
    border: none;
    tab-size: 4;
    caret-color: var(--accent);
    white-space: pre;
    overflow: auto;
}

#editor-textarea::selection {
    background: rgba(248, 152, 32, .2);
}

.output-pane {
    display: flex;
    flex-direction: column;
}

.output-content {
    flex: 1;
    padding: 16px;
    font-family: 'JetBrains Mono';
    font-size: .8rem;
    line-height: 1.7;
    background: #0d1117;
    overflow-y: auto;
    color: var(--text2);
    white-space: pre-wrap;
    word-break: break-word;
}

.output-content.has-output {
    color: var(--green2);
}

.output-content.has-error {
    color: #ff6b6b;
}

.output-placeholder {
    color: var(--text3);
    font-style: italic;
}

.output-label {
    display: inline-block;
    font-size: .68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .1em;
    margin-bottom: 8px;
    padding: 2px 8px;
    border-radius: 4px;
}

.label-success {
    background: rgba(16, 185, 129, .15);
    color: var(--green2);
}

.label-error {
    background: rgba(239, 68, 68, .15);
    color: #ff6b6b;
}

.snippet-bar {
    padding: 10px 16px;
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.snippet-label {
    font-size: .72rem;
    color: var(--text3);
    margin-right: 4px;
}

.snippet-btn {
    padding: 4px 12px;
    border-radius: 6px;
    background: var(--card2);
    border: 1px solid var(--border);
    color: var(--text2);
    font-size: .74rem;
    cursor: pointer;
    transition: var(--transition);
}

.snippet-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.editor-footer {
    padding: 8px 16px;
    background: var(--bg2);
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: .72rem;
    color: var(--text3);
    font-family: 'JetBrains Mono';
}

.spinner {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, .3);
    border-top-color: #fff;
    animation: spin .6s linear infinite;
}


/* ══════════════════════════════════════════════
   LOGIN / REGISTER PAGE
   ══════════════════════════════════════════════ */

.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px 20px 40px;
    background: radial-gradient(ellipse at 30% 20%, rgba(248, 152, 32, .07) 0%, transparent 60%), radial-gradient(ellipse at 70% 80%, rgba(59, 130, 246, .06) 0%, transparent 60%);
}

.auth-card {
    width: 100%;
    max-width: 440px;
    background: var(--card2);
    border: 1px solid var(--border2);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-lg);
    animation: fadeUp .5s ease both;
}

.auth-logo {
    text-align: center;
    margin-bottom: 32px;
}

.auth-logo .logo-icon {
    width: 52px;
    height: 52px;
    font-size: 1.4rem;
    margin: 0 auto 12px;
}

.auth-logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
}

.auth-logo p {
    color: var(--text3);
    font-size: .84rem;
    margin-top: 4px;
}

.auth-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 28px;
    background: var(--card);
    border-radius: 10px;
    padding: 4px;
    border: 1px solid var(--border);
}

.auth-tab {
    flex: 1;
    padding: 8px;
    border-radius: 8px;
    text-align: center;
    font-size: .84rem;
    font-weight: 600;
    cursor: pointer;
    color: var(--text3);
    border: none;
    background: transparent;
    transition: var(--transition);
}

.auth-tab.active {
    background: var(--card2);
    color: var(--accent);
    box-shadow: 0 1px 4px rgba(0, 0, 0, .3);
}


/* Form styles */

.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    font-size: .8rem;
    font-weight: 600;
    color: var(--text2);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    border-radius: 9px;
    background: var(--card);
    border: 1px solid var(--border2);
    color: var(--text);
    font-size: .9rem;
    transition: var(--transition);
    outline: none;
}

.form-control:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, .1);
}

.form-control::placeholder {
    color: var(--text3);
}

.form-control.is-invalid {
    border-color: var(--red);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, .1);
}

.invalid-feedback {
    font-size: .78rem;
    color: var(--red2);
    margin-top: 4px;
}

.input-group {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text3);
    font-size: .9rem;
    pointer-events: none;
}

.input-group .form-control {
    padding-left: 36px;
}

.input-toggle {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text3);
    cursor: pointer;
    font-size: .9rem;
}

.btn-submit {
    width: 100%;
    padding: 12px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--java-orange), #e67e22);
    color: #fff;
    font-weight: 700;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 8px;
    box-shadow: 0 0 24px rgba(248, 152, 32, .25);
}

.btn-submit:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 32px rgba(248, 152, 32, .35);
}

.btn-submit:active {
    transform: translateY(0);
}

.form-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 20px 0;
    color: var(--text3);
    font-size: .78rem;
}

.form-divider::before,
.form-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.auth-switch {
    text-align: center;
    font-size: .84rem;
    color: var(--text2);
    margin-top: 20px;
}

.auth-switch a {
    color: var(--accent);
    font-weight: 600;
}

.auth-switch a:hover {
    text-decoration: underline;
}

.alert {
    padding: 12px 16px;
    border-radius: 9px;
    margin-bottom: 16px;
    font-size: .84rem;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.alert-success {
    background: rgba(16, 185, 129, .1);
    border: 1px solid rgba(16, 185, 129, .25);
    color: var(--green2);
}

.alert-danger {
    background: rgba(239, 68, 68, .1);
    border: 1px solid rgba(239, 68, 68, .25);
    color: var(--red2);
}

.alert-info {
    background: rgba(59, 130, 246, .1);
    border: 1px solid rgba(59, 130, 246, .25);
    color: var(--blue2);
}

.remember-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: .82rem;
}

.remember-row a {
    color: var(--accent);
}

input[type="checkbox"] {
    accent-color: var(--accent);
}


/* ══════════════════════════════════════════════
   EXERCISES PAGE
   ══════════════════════════════════════════════ */

.exercises-header {
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    padding: 40px 48px 32px;
}

.exercises-header h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.exercises-header p {
    color: var(--text2);
    font-size: .95rem;
}

.exercises-grid {
    max-width: 1100px;
    margin: 40px auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}

.exercise-card {
    background: var(--card2);
    border: 1px solid var(--border2);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: var(--transition);
    cursor: pointer;
}

.exercise-card:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

.exercise-card.completed {
    border-color: var(--green);
}

.exercise-num {
    font-family: 'JetBrains Mono';
    font-size: .7rem;
    color: var(--accent);
    background: rgba(248, 152, 32, .1);
    padding: 3px 9px;
    border-radius: 5px;
    display: inline-block;
    margin-bottom: 12px;
}

.exercise-title {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text);
}

.exercise-desc {
    font-size: .84rem;
    color: var(--text2);
    line-height: 1.6;
    margin-bottom: 16px;
}

.exercise-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.exercise-badge {
    font-size: .72rem;
    padding: 3px 10px;
    border-radius: 20px;
    font-weight: 600;
}

.badge-easy {
    background: rgba(16, 185, 129, .15);
    color: var(--green2);
}

.badge-medium {
    background: rgba(245, 158, 11, .15);
    color: var(--accent2);
}

.badge-hard {
    background: rgba(239, 68, 68, .15);
    color: var(--red2);
}

.exercise-xp {
    font-size: .78rem;
    color: var(--text3);
    font-family: 'JetBrains Mono';
}


/* ══════════════════════════════════════════════
   ABOUT PAGE
   ══════════════════════════════════════════════ */

.about-hero {
    padding: 100px 24px 60px;
    text-align: center;
    background: radial-gradient(ellipse at 50% 0%, rgba(248, 152, 32, .1), transparent 60%);
}

.about-hero h1 {
    font-size: 2.4rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.about-hero p {
    color: var(--text2);
    max-width: 600px;
    margin: 0 auto;
    font-size: 1rem;
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 24px 80px;
}

.about-section {
    margin-bottom: 48px;
}

.about-section h2 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--accent);
}

.about-section p {
    color: var(--text2);
    line-height: 1.8;
    margin-bottom: 12px;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
}

.team-card {
    background: var(--card2);
    border: 1px solid var(--border2);
    border-radius: var(--radius-md);
    padding: 24px;
    text-align: center;
}

.team-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--java-orange), var(--java-blue));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin: 0 auto 12px;
}

.team-name {
    font-weight: 700;
    font-size: .95rem;
}

.team-role {
    color: var(--text3);
    font-size: .8rem;
}


/* ══════════════════════════════════════════════
   CONTACT PAGE
   ══════════════════════════════════════════════ */

.contact-wrap {
    max-width: 700px;
    margin: 80px auto;
    padding: 0 24px;
}

.contact-wrap h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.contact-wrap>p {
    color: var(--text2);
    margin-bottom: 32px;
}

.contact-card {
    background: var(--card2);
    border: 1px solid var(--border2);
    border-radius: var(--radius-lg);
    padding: 36px;
    box-shadow: var(--shadow-lg);
}


/* ══════════════════════════════════════════════
   USER PROFILE / DASHBOARD
   ══════════════════════════════════════════════ */

.profile-header {
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    padding: 48px 24px 32px;
    text-align: center;
}

.profile-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--java-orange), var(--java-blue));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    color: #fff;
    margin: 0 auto 16px;
}

.profile-name {
    font-size: 1.6rem;
    font-weight: 700;
}

.profile-email {
    color: var(--text2);
    font-size: .9rem;
    margin-top: 4px;
}

.xp-bar-wrap {
    max-width: 320px;
    margin: 20px auto 0;
}

.xp-bar {
    height: 8px;
    background: var(--border);
    border-radius: 4px;
    overflow: hidden;
}

.xp-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--java-orange), var(--java-blue));
    border-radius: 4px;
}

.xp-label {
    font-size: .75rem;
    color: var(--text3);
    margin-top: 5px;
    font-family: 'JetBrains Mono';
    text-align: right;
}

.profile-stats-row {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.profile-stat-item {
    text-align: center;
}

.profile-stat-num {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    font-family: 'JetBrains Mono';
}

.profile-stat-label {
    font-size: .72rem;
    color: var(--text3);
    text-transform: uppercase;
    letter-spacing: .07em;
}


/* ══════════════════════════════════════════════
   FOOTER
   ══════════════════════════════════════════════ */

footer {
    background: var(--bg2);
    border-top: 1px solid var(--border);
    padding: 40px 24px;
    text-align: center;
}

footer p {
    color: var(--text3);
    font-size: .84rem;
}

footer a {
    color: var(--accent);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.footer-links a {
    color: var(--text2);
    font-size: .84rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent);
}


/* ══════════════════════════════════════════════
   ANIMATIONS
   ══════════════════════════════════════════════ */

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: none;
    }
}

@keyframes fadeDown {
    from {
        opacity: 0;
        transform: translateY(-12px);
    }
    to {
        opacity: 1;
        transform: none;
    }
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

@keyframes pulse {
    0%,
    100% {
        opacity: .6;
    }
    50% {
        opacity: 1;
    }
}


/* ══════════════════════════════════════════════
   INLINE CODE
   ══════════════════════════════════════════════ */

code {
    font-family: 'JetBrains Mono';
    font-size: .84em;
    background: rgba(255, 255, 255, .06);
    color: var(--cyan);
    padding: 2px 7px;
    border-radius: 5px;
}

pre code {
    background: none;
    padding: 0;
    color: inherit;
    font-size: inherit;
}


/* ══════════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════════ */

@media (max-width:900px) {
    .main-layout {
        grid-template-columns: 1fr;
    }
    .sidebar {
        position: relative;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border);
        padding: 12px 0;
    }
    .content {
        padding: 24px 20px;
    }
    .editor-body {
        grid-template-columns: 1fr;
    }
    .editor-pane {
        border-right: none;
        border-bottom: 1px solid var(--border);
        min-height: 260px;
    }
    .two-col {
        grid-template-columns: 1fr;
    }
    .stats-bar {
        gap: 32px;
    }
}

@media (max-width:640px) {
    .header-inner {
        padding: 10px 16px;
    }
    .main-nav a span {
        display: none;
    }
    .hero h1 {
        font-size: 2rem;
    }
    .auth-card {
        padding: 28px 20px;
    }
    .exercises-grid {
        grid-template-columns: 1fr;
    }
}