/* ============================================================
 * 08000204 — Neo-Terminal design system
 * Sharp edges, monospace headings, terminal palette, dotted grid.
 * ============================================================ */

:root {
    --bg-color: #0a0e14;
    --bg-grid: rgba(255, 255, 255, 0.04);
    --card-bg: #0f141b;
    --text-color: #d6deeb;
    --text-bright: #f0f6ff;
    --text-muted: #5f6e83;
    --accent-color: #00ff9c;
    --accent-hover: #00d97e;
    --accent-soft: rgba(0, 255, 156, 0.12);
    --accent-secondary: #fbbf24;
    --input-bg: #060a0f;
    --border-color: #1f2933;
    --border-bright: #2d3748;
    --success-color: #00ff9c;
    --error-color: #ff6b6b;
    --result-bg: rgba(0, 255, 156, 0.06);

    --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Courier New", monospace;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

[data-theme="light"] {
    --bg-color: #f4f4ed;
    --bg-grid: rgba(0, 0, 0, 0.06);
    --card-bg: #ffffff;
    --text-color: #0a0e14;
    --text-bright: #000000;
    --text-muted: #6b7280;
    --accent-color: #059669;
    --accent-hover: #047857;
    --accent-soft: rgba(5, 150, 105, 0.10);
    --accent-secondary: #d97706;
    --input-bg: #fafaf7;
    --border-color: #0a0e14;
    --border-bright: #0a0e14;
    --success-color: #059669;
    --error-color: #dc2626;
    --result-bg: rgba(5, 150, 105, 0.06);
}

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

::selection {
    background: var(--accent-color);
    color: var(--bg-color);
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.55;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-image: radial-gradient(circle, var(--bg-grid) 1px, transparent 1px);
    background-size: 24px 24px;
}

/* Layout */
.container {
    width: 100%;
    max-width: 600px;
    padding: 20px;
}

.container--wide {
    max-width: 800px;
}

.container--xwide {
    max-width: 900px;
}

.container--narrow {
    max-width: 400px;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 36px;
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.2);
    animation: fadeIn 0.4s ease-out;
    position: relative;
}

[data-theme="light"] .card {
    box-shadow: 4px 4px 0 0 var(--border-color);
}

/* Optional terminal title bar above the icon */
.terminal-prompt {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 20px;
    letter-spacing: 0.01em;
}

.terminal-prompt::before {
    content: '$ ';
    color: var(--accent-color);
}

.card--center {
    text-align: center;
}

.card--center .terminal-prompt {
    text-align: left;
}

/* Card icon */
.card-icon {
    text-align: center;
    margin-bottom: 16px;
}

.card-icon svg {
    width: 48px;
    height: 48px;
}

.card-icon svg linearGradient stop:first-child,
.threads-logo linearGradient stop:first-child {
    stop-color: var(--accent-color);
}

.card-icon svg linearGradient stop:last-child,
.threads-logo linearGradient stop:last-child {
    stop-color: var(--accent-secondary);
}

/* Typography */
h1 {
    font-family: var(--font-mono);
    font-size: 1.65rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 24px;
    color: var(--text-bright);
    letter-spacing: -0.02em;
}

h1::after {
    content: '_';
    color: var(--accent-color);
    animation: blink 1.1s step-end infinite;
    margin-left: 4px;
    font-weight: 400;
}

.sub-header {
    font-family: var(--font-mono);
    color: var(--text-muted);
    text-align: center;
    margin-top: -12px;
    margin-bottom: 28px;
    font-size: 0.85rem;
}

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

label {
    display: block;
    margin-bottom: 8px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
    letter-spacing: 0.02em;
    text-transform: lowercase;
}

label::before {
    content: '> ';
    color: var(--accent-color);
}

input[type="url"],
input[type="text"],
input[type="password"],
input[type="datetime-local"],
input[type="number"],
input[type="email"],
textarea,
select {
    width: 100%;
    padding: 14px 16px;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-color);
    font-size: 0.95rem;
    font-family: var(--font-mono);
    transition: border-color 0.15s, box-shadow 0.15s;
    outline: none;
    appearance: none;
    -webkit-appearance: none;
    caret-color: var(--accent-color);
}

input::placeholder,
textarea::placeholder {
    color: var(--text-muted);
    opacity: 0.6;
}

input[type="url"]:focus,
input[type="text"]:focus,
input[type="password"]:focus,
input[type="datetime-local"]:focus,
input[type="number"]:focus,
input[type="email"]:focus,
textarea:focus,
select:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 1px var(--accent-color);
}

button {
    width: 100%;
    padding: 14px 20px;
    background-color: var(--accent-color);
    color: var(--bg-color);
    border: 1px solid var(--accent-color);
    border-radius: 4px;
    font-size: 0.9rem;
    font-family: var(--font-mono);
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: lowercase;
    cursor: pointer;
    transition: background-color 0.15s, color 0.15s, box-shadow 0.15s;
    -webkit-tap-highlight-color: transparent;
}

button:hover {
    background-color: transparent;
    color: var(--accent-color);
    box-shadow: 0 0 0 1px var(--accent-color), 0 0 24px -4px var(--accent-color);
}

button:active {
    transform: translateY(1px);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background-color: var(--accent-color);
    color: var(--bg-color);
    box-shadow: none;
}

/* Result / message blocks */
.result-section {
    margin-top: 28px;
    padding-top: 28px;
    border-top: 1px dashed var(--border-bright);
    animation: slideUp 0.3s ease-out;
}

.result-title {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 14px;
    text-align: center;
    letter-spacing: 0.02em;
}

.result-title::before {
    content: '// ';
    color: var(--accent-color);
}

.message {
    margin-top: 15px;
    padding: 12px 14px;
    border-radius: 4px;
    background-color: rgba(255, 107, 107, 0.08);
    color: var(--error-color);
    border: 1px solid rgba(255, 107, 107, 0.4);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    display: none;
}

.message::before {
    content: '! ';
    font-weight: 700;
}

.message.success {
    background-color: var(--accent-soft);
    color: var(--success-color);
    border-color: var(--accent-color);
}

.message.success::before {
    content: '✓ ';
}

.message.is-visible {
    display: block;
}

.footer {
    margin-top: 28px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    opacity: 0.7;
    text-align: center;
}

/* Stats grid */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 18px;
}

.stat-item {
    background-color: var(--input-bg);
    padding: 14px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    text-align: center;
}

.stat-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-bottom: 4px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-bright);
}

/* Copy button (sits inline inside an input row) */
.copy-btn {
    width: auto;
    margin: 0;
    padding: 0 18px;
    height: 100%;
    border-radius: 0;
    background-color: transparent;
    border: none;
    border-left: 1px solid var(--border-color);
    color: var(--text-muted);
    text-transform: lowercase;
    font-size: 0.8rem;
}

.copy-btn:hover {
    color: var(--accent-color);
    background-color: var(--accent-soft);
    box-shadow: none;
}

/* Navbar */
.navbar {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    padding: 16px 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
}

.nav-links {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 8px 18px;
    display: flex;
    align-items: center;
    gap: 18px;
    font-family: var(--font-mono);
}

.nav-item {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: color 0.15s;
    white-space: nowrap;
    letter-spacing: 0.02em;
}

.nav-item:hover {
    color: var(--text-color);
}

.nav-item.active {
    color: var(--accent-color);
}

.nav-item.active::before {
    content: '> ';
}

.nav-divider {
    width: 1px;
    height: 14px;
    background-color: var(--border-color);
}

.lang-switch-inline {
    display: flex;
    gap: 4px;
    font-family: var(--font-mono);
}

.lang-switch-inline a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.8rem;
    opacity: 0.7;
    transition: all 0.15s;
    white-space: nowrap;
}

.lang-switch-inline a:hover,
.lang-switch-inline a.active {
    color: var(--accent-color);
    opacity: 1;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.15s;
    width: auto;
    box-shadow: none;
}

.theme-toggle:hover {
    color: var(--accent-color);
    background: none;
    box-shadow: none;
    transform: none;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes blink {
    50% {
        opacity: 0;
    }
}

/* Mobile */
@media (max-width: 600px) {
    body {
        align-items: flex-start;
        padding-top: 72px;
    }

    .container {
        padding: 14px;
    }

    .card {
        padding: 22px;
    }

    h1 {
        font-size: 1.35rem;
    }

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

    .navbar {
        padding: 10px;
        justify-content: center;
    }

    .nav-links {
        max-width: 95%;
        overflow-x: auto;
        white-space: nowrap;
        padding: 8px 14px;
        gap: 14px;
        display: flex;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .nav-links::-webkit-scrollbar {
        display: none;
    }

    .nav-item {
        font-size: 0.8rem;
    }
}