/* =========================================
   Minimalist Modern Design System
   ========================================= */

/* CSS Variables for consistent theming */
:root {
    /* Colors */
    --color-primary: #000000;
    --color-secondary: #666666;
    --color-tertiary: #999999;
    --color-background: #FFFFFF;
    --color-surface: #F8F8F8;
    --color-border: #E5E5E5;
    --color-accent: #0066FF;
    --color-accent-hover: #0052CC;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 3rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;

    /* Layout */
    --container-max-width: 1280px;
    --header-height: 64px;
}

/* =========================================
   Reset & Base Styles
   ========================================= */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-primary);
    background-color: var(--color-background);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* =========================================
   Typography
   ========================================= */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    letter-spacing: -0.02em;
}

h2 {
    font-size: var(--font-size-2xl);
    letter-spacing: -0.01em;
}

h3 {
    font-size: var(--font-size-xl);
}

h4 {
    font-size: var(--font-size-lg);
}

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-accent);
}

/* =========================================
   Layout Components
   ========================================= */

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.site-main {
    flex: 1;
    padding-top: var(--header-height);
}

/* =========================================
   Header & Navigation
   ========================================= */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

.logo {
    font-size: var(--font-size-lg);
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--color-primary);
}

.logo:hover {
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-links a {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-secondary);
    transition: color var(--transition-fast);
}

.nav-links a:hover {
    color: var(--color-primary);
}

.logout-btn {
    background: none;
    border: none;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-secondary);
    cursor: pointer;
    padding: 0;
    font-family: var(--font-family);
    transition: color var(--transition-fast);
}

.logout-btn:hover {
    color: var(--color-primary);
}

/* =========================================
   Footer
   ========================================= */

.site-footer {
    margin-top: var(--spacing-xxl);
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--color-border);
    background-color: var(--color-surface);
}

.site-footer p {
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--color-tertiary);
    margin: 0;
}

.footer-links {
    margin-top: var(--spacing-sm);
}

.footer-links a {
    color: var(--color-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
    margin: 0 var(--spacing-xs);
}

.footer-links a:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

/* =========================================
   Buttons
   ========================================= */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: var(--font-size-base);
    font-weight: 500;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

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

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

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background-color: var(--color-surface);
    color: var(--color-primary);
}

/* =========================================
   Cards
   ========================================= */

.card {
    background-color: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

/* =========================================
   Forms
   ========================================= */

.form-group {
    margin-bottom: var(--spacing-md);
}

label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    color: var(--color-secondary);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="url"],
input[type="number"],
input[type="date"],
textarea,
select {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background-color: white;
    transition: all var(--transition-fast);
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.05);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

/* =========================================
   Utility Classes
   ========================================= */

.text-center {
    text-align: center;
}

.text-muted {
    color: var(--color-secondary);
}

.text-sm {
    font-size: var(--font-size-sm);
}

.text-lg {
    font-size: var(--font-size-lg);
}

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.pt-sm { padding-top: var(--spacing-sm); }
.pt-md { padding-top: var(--spacing-md); }
.pt-lg { padding-top: var(--spacing-lg); }
.pt-xl { padding-top: var(--spacing-xl); }

.pb-sm { padding-bottom: var(--spacing-sm); }
.pb-md { padding-bottom: var(--spacing-md); }
.pb-lg { padding-bottom: var(--spacing-lg); }
.pb-xl { padding-bottom: var(--spacing-xl); }

/* =========================================
   Grid System
   ========================================= */

.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* =========================================
   Responsive Design
   ========================================= */

@media (max-width: 768px) {
    :root {
        --font-size-3xl: 2rem;
        --font-size-2xl: 1.5rem;
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    .nav-links {
        gap: var(--spacing-md);
    }

    .nav-links a {
        font-size: var(--font-size-xs);
    }

    .grid-cols-2,
    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: 1fr;
    }
}

/* =========================================
   Dropdown Menu
   ========================================= */

.dropdown {
    position: relative;
}

.dropdown-toggle {
    background: none;
    border: none;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-secondary);
    cursor: pointer;
    padding: 0;
    font-family: var(--font-family);
    transition: color var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.dropdown-toggle:hover {
    color: var(--color-primary);
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 180px;
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 0.5rem 0;
    padding-top: 0.75rem;
    margin-top: 0.25rem;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
}

.dropdown-menu::before {
    content: '';
    position: absolute;
    top: -0.5rem;
    left: 0;
    right: 0;
    height: 0.5rem;
}

.dropdown:hover .dropdown-menu {
    display: block;
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu a {
    display: block;
    padding: 0.75rem 1rem;
    font-size: var(--font-size-sm);
    color: var(--color-secondary);
    transition: all var(--transition-fast);
}

.dropdown-menu a:hover {
    background-color: var(--color-surface);
    color: var(--color-primary);
}

.dropdown-divider {
    margin: 0.5rem 0;
    border: none;
    border-top: 1px solid var(--color-border);
}

.dropdown-logout {
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    padding: 0.75rem 1rem;
    font-size: var(--font-size-sm);
    font-family: var(--font-family);
    color: var(--color-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.dropdown-logout:hover {
    background-color: var(--color-surface);
    color: var(--color-primary);
}

/* =========================================
   Page-Specific Overrides
   ========================================= */

/* Remove extra padding from pages that have their own */
.music-index,
.artist-page,
.album-page {
    padding: 0;
}