/* ===================================
   Design System & CSS Variables
   =================================== */
:root {
    /* Color Palette - Sophisticated neutrals with warm accents */
    --color-bg-primary: hsl(210, 20%, 98%);
    --color-bg-secondary: hsl(210, 25%, 95%);
    --color-surface: hsl(0, 0%, 100%);
    --color-surface-hover: hsl(210, 30%, 97%);

    --color-text-primary: hsl(220, 15%, 20%);
    --color-text-secondary: hsl(220, 10%, 45%);
    --color-text-muted: hsl(220, 8%, 60%);

    --color-accent: hsl(25, 75%, 55%);
    --color-accent-hover: hsl(25, 75%, 48%);
    --color-accent-light: hsl(25, 85%, 92%);

    /* Typography */
    --font-display: 'Cormorant Garamond', serif;
    --font-body: 'Inter', 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: 2.5rem;
    --font-size-4xl: 3rem;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.03);

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --color-bg-primary: hsl(220, 18%, 12%);
        --color-bg-secondary: hsl(220, 18%, 16%);
        --color-surface: hsl(220, 18%, 18%);
        --color-surface-hover: hsl(220, 18%, 22%);

        --color-text-primary: hsl(210, 20%, 95%);
        --color-text-secondary: hsl(210, 15%, 75%);
        --color-text-muted: hsl(210, 10%, 55%);

        --color-accent: hsl(25, 85%, 60%);
        --color-accent-hover: hsl(25, 85%, 68%);
        --color-accent-light: hsl(25, 75%, 25%);

        --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
        --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 10px 10px -5px rgba(0, 0, 0, 0.5);
    }
}

/* ===================================
   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-body);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===================================
   Layout
   =================================== */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

/* ===================================
   Header
   =================================== */
.header {
    text-align: center;
    padding: var(--spacing-xl) 0;
    animation: fadeInDown var(--transition-slow) ease-out;
}

.site-title {
    font-family: var(--font-display);
    font-size: var(--font-size-3xl);
    font-weight: 300;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
    letter-spacing: 0.02em;
}

.site-subtitle {
    font-family: var(--font-body);
    font-size: var(--font-size-sm);
    font-weight: 400;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

.language-switcher {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 100;
}

.language-dropdown {
    position: relative;
}

.language-current {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-surface);
    color: var(--color-text-primary);
    border: 1px solid var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    font-family: var(--font-body);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    user-select: none;
}

.language-current:hover {
    background: var(--color-surface-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.language-flag {
    font-size: var(--font-size-lg);
    line-height: 1;
}

.language-name {
    min-width: 60px;
}

.language-arrow {
    margin-left: var(--spacing-xs);
    transition: transform var(--transition-base);
}

.language-dropdown.open .language-arrow {
    transform: rotate(180deg);
}

.language-menu {
    position: absolute;
    top: calc(100% + var(--spacing-xs));
    right: 0;
    min-width: 140px;
    background: var(--color-surface);
    border: 1px solid var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
    overflow: hidden;
}

.language-dropdown.open .language-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text-primary);
    text-decoration: none;
    font-family: var(--font-body);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.language-option:hover {
    background: var(--color-accent-light);
    color: var(--color-accent);
}

.language-option.active {
    background: var(--color-accent-light);
    color: var(--color-accent);
    font-weight: 600;
}

.language-option .language-flag {
    font-size: var(--font-size-base);
}

/* Mobile adjustments */
@media (max-width: 768px) {
    .language-switcher {
        top: var(--spacing-md);
        right: var(--spacing-md);
    }

    .language-current {
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .language-name {
        display: none;
    }
}

/* ===================================
   Quote Card
   =================================== */
.quote-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl) 0;
}

.quote-card {
    background: var(--color-surface);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-3xl) var(--spacing-2xl);
    box-shadow: var(--shadow-xl);
    max-width: 700px;
    width: 100%;
    position: relative;
    transition: all var(--transition-base);
    animation: fadeIn var(--transition-slow) ease-out;
}

.quote-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 25px 35px -5px rgba(0, 0, 0, 0.1), 0 15px 15px -5px rgba(0, 0, 0, 0.04);
}

.quote-mark {
    position: absolute;
    top: var(--spacing-lg);
    left: var(--spacing-lg);
    font-family: var(--font-display);
    font-size: 6rem;
    line-height: 1;
    color: var(--color-accent-light);
    opacity: 0.3;
    user-select: none;
}

.quote-text {
    font-family: var(--font-display);
    font-size: var(--font-size-2xl);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xl);
    position: relative;
    z-index: 1;
    font-style: normal;
}

.quote-author {
    display: block;
    font-family: var(--font-body);
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--color-text-secondary);
    text-align: right;
    font-style: normal;
    position: relative;
    z-index: 1;
}

/* ===================================
   Button
   =================================== */
.new-quote-btn {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-md) var(--spacing-2xl);
    background: var(--color-accent);
    color: white;
    border: none;
    border-radius: var(--radius-xl);
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    letter-spacing: 0.02em;
}

.new-quote-btn:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.new-quote-btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

/* Share Button */
.share-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: transparent;
    color: var(--color-text-secondary);
    border: 2px solid var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    font-family: var(--font-body);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
    margin-top: var(--spacing-md);
}

.share-btn:hover {
    background: var(--color-surface);
    color: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.share-btn:active {
    transform: translateY(0);
}

.share-btn svg {
    transition: transform var(--transition-base);
}

.share-btn:hover svg {
    transform: scale(1.1);
}

/* Toast notification */
.toast {
    position: fixed;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--color-text-primary);
    color: var(--color-bg-primary);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    font-family: var(--font-body);
    font-size: var(--font-size-sm);
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transition: all var(--transition-base);
    z-index: 1000;
    pointer-events: none;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

@media (max-width: 768px) {
    .share-btn {
        width: 100%;
        justify-content: center;
    }
}

.btn-icon {
    transition: transform var(--transition-base);
}

.new-quote-btn:hover .btn-icon {
    transform: rotate(180deg);
}

/* ===================================
   Footer
   =================================== */
.footer {
    text-align: center;
    padding: var(--spacing-xl) 0;
    animation: fadeInUp var(--transition-slow) ease-out;
}

.footer-text {
    font-family: var(--font-body);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    font-style: italic;
}

/* ===================================
   Animations
   =================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-out {
    animation: fadeOut var(--transition-fast) ease-out forwards;
}

@keyframes fadeOut {
    from {
        opacity: 1;
        transform: scale(1);
    }

    to {
        opacity: 0;
        transform: scale(0.95);
    }
}

.fade-in {
    animation: fadeIn var(--transition-base) ease-out forwards;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }

    .site-title {
        font-size: var(--font-size-2xl);
    }

    .site-subtitle {
        font-size: var(--font-size-xs);
    }

    .quote-card {
        padding: var(--spacing-2xl) var(--spacing-lg);
    }

    .quote-mark {
        font-size: 4rem;
        top: var(--spacing-md);
        left: var(--spacing-md);
    }

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

    .quote-author {
        font-size: var(--font-size-base);
    }

    .new-quote-btn {
        padding: var(--spacing-sm) var(--spacing-xl);
        font-size: var(--font-size-sm);
    }
}

@media (max-width: 480px) {
    .header {
        padding: var(--spacing-lg) 0;
    }

    .site-title {
        font-size: var(--font-size-xl);
    }

    .quote-card {
        padding: var(--spacing-xl) var(--spacing-md);
    }

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

    .quote-mark {
        font-size: 3rem;
    }
}

/* ===================================
   Accessibility
   =================================== */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.new-quote-btn:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 3px;
}