/* Modern theme with Indigo primary (#1A237E) */

/* CSS Variables */
:root {
    --primary: #1A237E; /* Indigo 900 */
    --primary-hover: #283593; /* Indigo 800 */
    --primary-contrast: #ffffff;
    --bg: #F7F8FC;
    --text: #0F172A; /* slate-900 */
    --muted: #475569; /* slate-600 */
    --card-bg: #ffffff;
    --border: #E5E7EB;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 8px 24px rgba(26,35,126,0.15);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0B1020;
        --text: #E5E7EB;
        --muted: #94A3B8;
        --card-bg: #0F172A;
        --border: #1F2937;
        --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
        --shadow-md: 0 8px 24px rgba(0,0,0,0.35);
    }
}

/* Reset and base */
* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
}

body {
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
    margin: 0;
    padding: 0;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

/* Header */
header {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: var(--primary-contrast);
    padding: 48px 24px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(26,35,126,0.25);
}

header h1 {
    margin: 0;
    font-size: 2.125rem;
    letter-spacing: -0.01em;
}

/* Layout */
main {
    max-width: 960px;
    margin: 32px auto;
    padding: 0 16px;
}

section {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 24px;
    box-shadow: var(--shadow-sm);
    margin: 16px 0;
}

section + section {
    margin-top: 20px;
}

h2 {
    color: var(--text);
    margin: 0 0 12px 0;
    font-size: 1.25rem;
}

p {
    color: var(--muted);
    margin: 0 0 12px 0;
}

a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

a:hover {
    text-decoration: underline;
}

/* Forms */
form {
    display: grid;
    gap: 12px;
}

label {
    font-weight: 600;
}

input[type="text"],
input[type="email"],
textarea {
    font-family: inherit;
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--card-bg);
    color: var(--text);
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

textarea {
    min-height: 120px;
    resize: vertical;
}

input:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(26,35,126,0.15);
}

/* Buttons */
button,
.btn {
    appearance: none;
    border: none;
    background: var(--primary);
    color: var(--primary-contrast);
    padding: 12px 18px;
    border-radius: 12px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: transform 0.05s ease, background 0.2s ease, box-shadow 0.2s ease;
}

button:hover,
.btn:hover {
    background: var(--primary-hover);
    box-shadow: 0 12px 30px rgba(26,35,126,0.25);
}

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

button:focus-visible,
.btn:focus-visible {
    outline: 3px solid rgba(26,35,126,0.5);
    outline-offset: 2px;
}

/* Privacy page preformatted text */
#privacy-policy-text {
    white-space: pre-wrap;
    background: rgba(148, 163, 184, 0.08);
    border: 1px solid var(--border);
    padding: 16px;
    border-radius: 12px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    color: var(--text);
}

/* Footer (not used yet, but keeping for completeness) */
footer {
    text-align: center;
    padding: 16px 0;
    background: var(--primary);
    color: var(--primary-contrast);
}