:root {
    --bg-color: #ffffff;
    --text-color: #1a1a1a;
    --primary-color: #6366f1;
    /* Indigo */
    --secondary-color: #a855f7;
    /* Purple */
    --accent-color: #ec4899;
    /* Pink */
    --card-bg: #f3f4f6;
    --border-color: #e5e7eb;
    --sidebar-bg: #f9fafb;
    --input-bg: #ffffff;

    --transition-speed: 0.3s;
}

[data-theme="dark"] {
    --bg-color: #0f172a;
    /* Slate 900 */
    --text-color: #f8fafc;
    --primary-color: #818cf8;
    --secondary-color: #c084fc;
    --accent-color: #f472b6;
    --card-bg: #1e293b;
    /* Slate 800 */
    --border-color: #334155;
    --sidebar-bg: #111827;
    /* Gray 900 */
    --input-bg: #334155;
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color var(--transition-speed), color var(--transition-speed);
    line-height: 1.6;
}

a {
    color: var(--primary-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header */
header {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(to right, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    background-clip: text;
    /* Standard property */
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.btn {
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: transform 0.1s, opacity 0.2s;
    background-color: var(--primary-color);
    color: white;
}

.btn:hover {
    opacity: 0.9;
    text-decoration: none;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

/* Hero */
.hero {
    text-align: center;
    padding: 4rem 1rem;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-color);
    opacity: 0.8;
    max-width: 600px;
    margin: 0 auto 2rem;
}

/* Tool Grid */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    padding: 2rem 0;
}

.tool-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 1.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    flex-direction: column;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.tool-icon {
    /* font-size removed to allow SVG sizing */
    margin-bottom: 1rem;
}

.tool-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.tool-desc {
    font-size: 0.9rem;
    opacity: 0.7;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

/* Input Area */
.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

textarea,
input[type="text"],
input[type="email"],
input[type="password"] {
    width: 100%;
    padding: 0.75rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    background: var(--input-bg);
    color: var(--text-color);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

textarea:focus,
input:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
    /* Soft glow */
}

/* Select Styling */
select,
.select-field {
    width: 100%;
    padding: 0.75rem;
    padding-right: 2rem;
    /* Space for arrow */
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    background-color: var(--input-bg);
    color: var(--text-color);
    font-family: inherit;
    font-size: 1rem;
    appearance: none;
    /* Remove default arrow */
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    cursor: pointer;
}

/* Dark mode specific arrow adjustment if needed, usually gray works for both */
[data-theme="dark"] select,
[data-theme="dark"] .select-field {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%239ca3af' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
}

/* Result Area */
.result-area {
    margin-top: 2rem;
    background: var(--card-bg);
    border-radius: 1rem;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    position: relative;
    display: none;
    /* Hidden by default */
}

.result-content {
    white-space: pre-wrap;
    font-family: 'Courier New', Courier, monospace;
}

.copy-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 0.8rem;
    padding: 0.25rem 0.5rem;
}

.feedback-btn {
    transition: transform 0.2s, background-color 0.2s;
}

.feedback-btn:hover {
    background-color: var(--border-color) !important;
}

.feedback-btn.active {
    background-color: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
}

/* Footer */
footer {
    margin-top: 4rem;
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
    opacity: 0.6;
}

/* Utils */
.hidden {
    display: none;
}

.badge {
    display: inline-block;
    padding: 0.25em 0.5em;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 0.25rem;
    background-color: var(--secondary-color);
    color: white;
    margin-left: 0.5rem;
}