/* =========================================
   1. DESIGN TOKENS
   ========================================= */
:root {
    --bg-color: #fdfbf7;
    --fg-color: #2d2d2d;
    --muted-color: #e5e0d8;
    --card-bg: #ffffff;

    --accent-red: #ff4d4d;
    --accent-blue: #2d5da1;
    --accent-orange: #ff8a65;
    --accent-green: #81c784;
    --accent-purple: #9575cd;

    --shadow-color: #2d2d2d;

    --font-heading: 'Kalam', cursive;
    --font-body: 'Patrick Hand', cursive;

    --radius-wobbly: 255px 15px 225px 15px / 15px 225px 15px 255px;
    --radius-wobbly-md: 225px 25px 255px 25px / 25px 255px 25px 225px;
    --radius-wobbly-sm: 25px 225px 25px 255px / 255px 25px 225px 25px;

    --shadow-base: 4px 4px 0px 0px var(--shadow-color);
    --shadow-hover: 2px 2px 0px 0px var(--shadow-color);
}

[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --fg-color: #f5f5f5;
    --muted-color: #333333;
    --card-bg: #242424;
    --shadow-color: #000000;

    --accent-red: #ff6b6b;
    --accent-blue: #4dabf7;
    --accent-orange: #ff922b;
    --accent-green: #51cf66;
    --accent-purple: #b197fc;
}

/* =========================================
   2. BASE STYLES
   ========================================= */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-color);
    color: var(--fg-color);
    font-family: var(--font-body);
    font-size: 1.125rem;
    line-height: 1.6;
    background-image: radial-gradient(var(--muted-color) 1px, transparent 1px);
    background-size: 24px 24px;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--fg-color);
}

a {
    color: var(--accent-blue);
    transition: color 0.2s;
}

/* =========================================
   3. LAYOUT
   ========================================= */
.hd-container {
    max-width: 64rem;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.content-narrow {
    max-width: 48rem;
    margin: 0 auto;
}

.header-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: inherit;
}

.hd-logo-img {
    height: 32px;
    width: auto;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    transform: rotate(-2deg);
}

.hd-nav {
    display: flex;
    align-items: center;
    gap: 1rem;
}

@media (min-width: 768px) {
    .hd-logo-img { height: 40px; }
    .logo-text { font-size: 1.75rem; }
}

/* =========================================
   4. COMPONENTS
   ========================================= */
.hd-icon-btn {
    background: transparent;
    border: 2px solid var(--fg-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hd-icon-btn:hover {
    background: var(--fg-color);
    color: var(--bg-color);
}

.hd-button {
    display: inline-flex;
    padding: 0.5rem 1rem;
    font-family: var(--font-body);
    font-size: 1.1rem;
    color: var(--fg-color);
    background-color: var(--card-bg);
    border: 2px solid var(--fg-color);
    border-radius: var(--radius-wobbly);
    box-shadow: var(--shadow-base);
    cursor: pointer;
    transition: all 0.1s ease-in-out;
    text-decoration: none;
    align-items: center;
}

.hd-button:hover {
    background-color: var(--accent-red);
    color: #fff;
    box-shadow: var(--shadow-hover);
    transform: translate(2px, 2px) rotate(-1deg);
}

.hd-card {
    position: relative;
    background-color: var(--card-bg);
    border: 3px solid var(--fg-color);
    border-radius: var(--radius-wobbly-md);
    padding: 2rem;
    box-shadow: var(--shadow-base);
    transition: background-color 0.3s ease, border-color 0.3s ease;
    margin-bottom: 3rem;
}

.hd-title {
    font-size: 3rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

/* Decorations */
.hd-card[data-decoration="tape"]::before {
    content: '';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%) rotate(-3deg);
    width: 80px;
    height: 25px;
    background-color: rgba(150, 150, 150, 0.3);
    border: 1px solid var(--fg-color);
    z-index: 10;
}

.hd-card[data-decoration="tack"]::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 16px;
    background-color: var(--accent-red);
    border: 2px solid var(--fg-color);
    border-radius: 50%;
    box-shadow: 2px 2px 0px 0px var(--shadow-color);
    z-index: 10;
}