/* --- CSS Variables for Themes --- */
:root {
    --bg: #faf9f7;
    --bg-elevated: #ffffff;
    --card: #ffffff;
    --border: #e5e3df;
    --border-hover: #d4d1cb;
    --fg: #1a1817;
    --muted: #6b6560;
    --accent: #e85d04; /* Orange for HTML theme */
    --accent-light: #fff3ed;
    --accent-glow: rgba(232, 93, 4, 0.15);
    --secondary: #0077b6;
    --success: #2d9b2d;
    --input-bg: #ffffff;
    --pattern-opacity: 0.3;
}

[data-theme="dark"] {
    --bg: #0a0a0f;
    --bg-elevated: #12121a;
    --card: #16161f;
    --border: #2a2a3a;
    --border-hover: #3a3a4a;
    --fg: #e8e8ed;
    --muted: #6b6b7a;
    --accent: #ff6b35; /* Brighter orange for dark mode */
    --accent-light: #ff6b3520;
    --accent-glow: rgba(255, 107, 53, 0.2);
    --secondary: #6366f1;
    --success: #00d992;
    --input-bg: #0f0f14;
    --pattern-opacity: 0.05;
}

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

body {
    font-family: 'Space Grotesk', sans-serif;
    background-color: var(--bg);
    color: var(--fg);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color 0.4s ease, color 0.4s ease;
}

/* --- Background Decorations --- */
.bg-decoration {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.bg-pattern {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle, var(--muted) 1px, transparent 1px);
    background-size: 24px 24px;
    opacity: var(--pattern-opacity);
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, #ffe0c2, #ffd4b8);
    top: -150px;
    right: -100px;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, #d0e8ff, #c2e0ff);
    bottom: -100px;
    left: -100px;
    animation-delay: -5s;
}

[data-theme="dark"] .orb-1 {
    background: var(--accent);
    opacity: 0.15;
}

[data-theme="dark"] .orb-2 {
    background: var(--secondary);
    opacity: 0.15;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, 20px) scale(1.05); }
}

/* --- Layout --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
    position: relative;
}

/* --- Header --- */
header {
    text-align: center;
    margin-bottom: 3rem;
}

.header-top {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 50px;
    border: 1px solid var(--border);
    background: var(--card);
    font-size: 14px;
    color: var(--muted);
    transition: all 0.3s ease;
}

.pulse-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    animation: pulse 2s infinite;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 0.5rem;
}

h1 span {
    color: var(--accent);
}

.subtitle {
    color: var(--muted);
    font-size: 1.1rem;
    max-width: 500px;
    margin: 0 auto;
}

/* --- Theme Toggle --- */
.theme-toggle {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    z-index: 100;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--card);
    border: 2px solid var(--border);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.theme-toggle:hover {
    transform: rotate(15deg) scale(1.1);
    border-color: var(--accent);
    background: var(--accent-light);
}

.theme-toggle svg {
    width: 24px;
    height: 24px;
    stroke: var(--fg);
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: all 0.3s ease;
}

/* --- Stats Grid --- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

@media (min-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    h1 { font-size: 3.5rem; }
}

.stat-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.25rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0,0,0,0.02);
}

.stat-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: 0 12px 24px rgba(0,0,0,0.05);
}

.stat-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--muted);
    margin-bottom: 0.5rem;
}

.stat-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.5rem;
    font-weight: 700;
}

.stat-value.accent { color: var(--accent); }
.stat-value.secondary { color: var(--secondary); }

.progress-bar {
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    margin-top: 0.75rem;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--secondary));
    border-radius: 3px;
    transition: width 0.5s ease;
}

/* --- Editor Area --- */
.editor-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
    .editor-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--muted);
}

.label svg {
    width: 16px;
    height: 16px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

.actions {
    display: flex;
    gap: 0.5rem;
}

/* --- Buttons --- */
.btn {
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    font-family: inherit;
}

.btn-icon {
    background: var(--card);
    border: 1px solid var(--border);
    color: var(--muted);
    padding: 8px;
    border-radius: 8px;
}

.btn-icon:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: var(--accent-light);
}

.btn-icon svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

.btn-main-group {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
}

.btn-primary {
    background: var(--accent);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    padding: 0.875rem 2rem;
    border-radius: 12px;
    gap: 0.5rem;
    box-shadow: 0 4px 16px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--accent-glow);
    filter: brightness(1.1);
}

.btn-secondary {
    background: var(--card);
    color: var(--fg);
    font-size: 1rem;
    font-weight: 600;
    padding: 0.875rem 1.5rem;
    border-radius: 12px;
    border: 2px solid var(--border);
    gap: 0.5rem;
}

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

.btn svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

/* --- Code Area --- */
.code-area {
    width: 100%;
    min-height: 350px;
    background: var(--input-bg);
    border: 2px solid var(--border);
    border-radius: 16px;
    padding: 1rem;
    color: var(--fg);
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    line-height: 1.6;
    resize: vertical;
    transition: all 0.3s ease;
}

.code-area:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-glow);
}

.code-area::placeholder {
    color: var(--muted);
    opacity: 0.6;
}

/* --- Options Panel --- */
.options-panel {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.5rem;
    margin-top: 2rem;
}

.options-title {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--muted);
    margin-bottom: 1rem;
}

.options-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.option-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-weight: 500;
    transition: color 0.2s;
}

.option-item:hover {
    color: var(--accent);
}

/* Custom Checkbox */
input[type="checkbox"] {
    appearance: none;
    width: 22px;
    height: 22px;
    border: 2px solid var(--border);
    border-radius: 6px;
    background: var(--bg);
    cursor: pointer;
    position: relative;
    transition: all 0.2s;
}

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

input[type="checkbox"]:checked::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 2px;
    width: 6px;
    height: 12px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

/* --- Toast --- */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--card);
    border: 1px solid var(--accent);
    padding: 1rem 1.5rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    z-index: 1000;
    font-weight: 500;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast svg {
    width: 20px;
    height: 20px;
    stroke: var(--accent);
    fill: none;
    stroke-width: 2.5;
}

/* --- Utility --- */
.pulse-animation {
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 4px 16px var(--accent-glow); }
    50% { box-shadow: 0 4px 32px var(--accent-glow); }
}

.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}