/* ========================================================================== */
/* Base (tokens, resets, shared primitives)                                   */
/* Load order: 1 (must be first)                                              */
/* Provides CSS variables, element resets, base buttons, visibility helpers.   */
/* ========================================================================== */
/* Base Theme Tokens and Resets */
:root {
    color-scheme: dark;
    --primary-color: #ff6b6b;
    --secondary-color: #4ecdc4;
    --accent-color: #45b7d1;
    --bg-primary: #0f1012;
    --bg-secondary: #1a1b1e;
    --bg-tertiary: #2c2d30;
    --text-primary: #e6e6e6;
    --text-secondary: #b0b0b0;
    --border-color: #333;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.2);
}

* {
    box-sizing: border-box;
}

html {
    /* Prevent horizontal scrolling on mobile */
    overflow-x: hidden;
    width: 100%;
    position: relative;
}

body {
    margin: 0;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans";
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    /* Prevent horizontal scrolling on mobile */
    overflow-x: hidden;
    width: 100%;
    position: relative;
}

/* Shared Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

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

.btn-primary:hover {
    background: #ff5252;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-color);
}

/* Visibility helpers */
.desktop-only { display: block; }
.mobile-only { display: none; }