/* RESET & BASE */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* THEME VARIABLES */
:root {
    /* Light theme (default) */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-header-footer: rgba(255, 255, 255, 0.95);
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --border-color: #e2e8f0;
    --card-bg: #ffffff;
    --btn-primary-bg: #3b82f6;
    --btn-primary-hover: #2563eb;
    --btn-outline-border: #cbd5e1;
    --btn-outline-hover-bg: #f1f5f9;
    --gradient-start: #3b82f6;
    --gradient-end: #6366f1;
    --modal-bg: #ffffff;
    --preview-bg: #f1f5f9;
    --preview-own: #3b82f6;
    --preview-other: #e2e8f0;
    --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.02);
}

[data-theme="dark"] {
    --bg-primary: #0a0e1a;
    --bg-secondary: #0f172a;
    --bg-header-footer: rgba(10, 14, 26, 0.95);
    --text-primary: #eef2ff;
    --text-secondary: #cbd5e1;
    --border-color: #1e293b;
    --card-bg: #111827;
    --btn-primary-bg: #3b82f6;
    --btn-primary-hover: #60a5fa;
    --btn-outline-border: #334155;
    --btn-outline-hover-bg: #1e293b;
    --gradient-start: #60a5fa;
    --gradient-end: #818cf8;
    --modal-bg: #1e293b;
    --preview-bg: #0f172a;
    --preview-own: #3b82f6;
    --preview-other: #334155;
    --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3), 0 8px 10px -6px rgba(0, 0, 0, 0.2);
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color 0.3s ease, color 0.2s ease;
}

button {
    cursor: pointer;
    font-family: inherit;
}

a {
    text-decoration: none;
    color: var(--text-secondary);
    transition: color 0.2s;
}

a:hover {
    color: var(--btn-primary-bg);
}