/**
 * Common CSS - Shared styles for michael.roth.rocks
 * Used by: index.html, admin/notifications.html
 */

/* ==============================================
   CSS Variables
   ============================================== */
:root {
    --paper: #FDFBF7;
    --ink: #2C2C2C;
    --ink-light: #555555;
    --accent-teal: #4A6C6F;
    --accent-teal-hover: #3d5a5d;
    --data-grey: #708090;
    --border-subtle: #E8E4DC;
    --canvas-bg: #F5F3ED;

    --font-display: 'Fraunces', Georgia, serif;
    --font-body: 'Source Serif 4', Georgia, serif;
    --font-ui: system-ui, -apple-system, sans-serif;

    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 2rem;
    --space-xl: 4rem;
}

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

html {
    font-size: 18px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background: var(--paper);
    color: var(--ink);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    position: relative;
}

/* Subtle grain texture overlay */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.02;
    pointer-events: none;
    z-index: 0;
}

/* ==============================================
   Common Form Styles
   ============================================== */
.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.form-group label {
    font-family: var(--font-ui);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--ink-light);
}

.form-group input,
.form-group textarea {
    font-family: var(--font-body);
    font-size: 1rem;
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--border-subtle);
    border-radius: 4px;
    background: var(--paper);
    color: var(--ink);
    transition: border-color 200ms ease, box-shadow 200ms ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-teal);
    box-shadow: 0 0 0 3px rgba(74, 108, 111, 0.1);
}

/* ==============================================
   Common Button Styles
   ============================================== */
.btn {
    font-family: var(--font-ui);
    font-size: 0.85rem;
    font-weight: 500;
    padding: var(--space-sm) var(--space-lg);
    background: var(--accent-teal);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background 200ms ease, transform 100ms ease;
    text-align: center;
}

.btn:hover {
    background: var(--accent-teal-hover);
}

.btn:active {
    transform: scale(0.98);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ==============================================
   Common Status Message Styles
   ============================================== */
.status-message {
    font-family: var(--font-ui);
    font-size: 0.85rem;
    padding: var(--space-sm) var(--space-md);
    border-radius: 4px;
    display: none;
}

.status-message.success {
    display: block;
    background: rgba(74, 108, 111, 0.1);
    color: var(--accent-teal);
    border: 1px solid var(--accent-teal);
}

.status-message.error {
    display: block;
    background: rgba(192, 80, 77, 0.1);
    color: #C0504D;
    border: 1px solid #C0504D;
}

.status-message.info {
    display: block;
    background: rgba(112, 128, 144, 0.1);
    color: var(--data-grey);
    border: 1px solid var(--data-grey);
}

/* ==============================================
   Responsive Base
   ============================================== */
@media (max-width: 600px) {
    html {
        font-size: 16px;
    }

    body {
        padding: var(--space-md);
        justify-content: flex-start;
        padding-top: var(--space-xl);
    }
}