/* ==========================================================================
   Fun Projects - Enhanced Main Stylesheet
   ========================================================================== */

/* Import font moderni */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&display=swap');

/* CSS Variables */
:root {
    /* Colors - Light theme */
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #a78bfa;
    --color-accent: #f59e0b;

    --color-bg: #ffffff;
    --color-bg-secondary: #f8fafc;
    --color-bg-card: #ffffff;

    --color-text: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;

    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;

    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;

    /* Gradienti moderni */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-card: linear-gradient(145deg, var(--color-bg-card) 0%, rgba(99, 102, 241, 0.02) 100%);
    --gradient-border: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-light) 100%);

    /* Ombre professionali */
    --shadow-soft: 0 2px 20px rgba(99, 102, 241, 0.08);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-card: 0 4px 25px rgba(0, 0, 0, 0.06);
    --shadow-card-hover: 0 8px 40px rgba(99, 102, 241, 0.15);
    --shadow-button: 0 2px 10px rgba(99, 102, 241, 0.2);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-family-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;

    /* Line heights */
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

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

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;

    /* Layout */
    --container-max-width: 1200px;
    --header-height: 4rem;
}

/* Dark theme variables */
[data-theme="dark"] {
    --color-bg: #0f172a;
    --color-bg-secondary: #1e293b;
    --color-bg-card: #1e293b;

    --color-text: #f1f5f9;
    --color-text-secondary: #cbd5e1;
    --color-text-muted: #64748b;

    --color-border: #334155;
    --color-border-light: #475569;
}

/* Auto dark mode */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) {
        --color-bg: #0f172a;
        --color-bg-secondary: #1e293b;
        --color-bg-card: #1e293b;

        --color-text: #f1f5f9;
        --color-text-secondary: #cbd5e1;
        --color-text-muted: #64748b;

        --color-border: #334155;
        --color-border-light: #475569;
    }
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    background-color: var(--color-bg);
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

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

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ==========================================================================
   Header con effetti moderni
   ========================================================================== */

.header {
    padding: var(--space-2xl) 0;
    text-align: center;
    background: linear-gradient(135deg,
    var(--color-bg) 0%,
    rgba(99, 102, 241, 0.03) 50%,
    var(--color-bg-secondary) 100%);
    border-bottom: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.05) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite;
}

.header-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.title {
    font-size: clamp(2rem, 4vw, var(--font-size-5xl));
    font-weight: 800;
    letter-spacing: -0.025em;
    line-height: var(--line-height-tight);
    margin: 0 0 var(--space-md) 0;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
}

.dice-icon {
    font-size: var(--font-size-3xl);
    filter: grayscale(0);
    animation: dice-bounce 2s ease-in-out infinite;
}

.subtitle {
    font-size: var(--font-size-xl);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-secondary);
    margin: 0 0 var(--space-xl) 0;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 400;
    opacity: 0.8;
}

.lang-switcher {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
}

.lang-link {
    text-decoration: none;
    color: var(--color-text-secondary);
    font-weight: 500;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.lang-link:hover {
    color: var(--color-primary);
    background-color: var(--color-bg-secondary);
}

.lang-link.active {
    color: var(--color-primary);
    font-weight: 600;
}

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

/* ==========================================================================
   Main Content
   ========================================================================== */

.main {
    flex: 1;
    padding: var(--space-2xl) 0;
}

/* ==========================================================================
   Controls migliorati
   ========================================================================== */

.controls {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
    align-items: center;
}

.search-box {
    position: relative;
    max-width: 400px;
    width: 100%;
}

.search-box i {
    position: absolute;
    left: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    pointer-events: none;
}

.search-box input {
    width: 100%;
    padding: var(--space-md) var(--space-md) var(--space-md) 2.5rem;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    color: var(--color-text);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-soft);
}

.search-box input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1), var(--shadow-soft);
}

.filter-buttons {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
    justify-content: center;
}

.filter-btn {
    padding: var(--space-sm) var(--space-lg);
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-transform: capitalize;
    position: relative;
    overflow: hidden;
}

.filter-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    transition: left var(--transition-normal);
    z-index: -1;
}

.filter-btn:hover::before {
    left: 0;
}

.filter-btn:hover {
    color: white;
    border-color: var(--color-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-button);
}

.filter-btn.active {
    background: var(--gradient-primary);
    border-color: var(--color-primary);
    color: white;
    box-shadow: var(--shadow-button);
}

/* ==========================================================================
   Projects Container modernizzato
   ========================================================================== */

.projects-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.project-card {
    background: var(--gradient-card);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-border);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.project-card:hover {
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-3px);
    border-color: rgba(99, 102, 241, 0.2);
}

.project-card:hover::before {
    opacity: 1;
}

.project-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-md);
}

.project-name {
    font-size: var(--font-size-xl);
    line-height: var(--line-height-tight);
    font-weight: 700;
    letter-spacing: -0.01em;
    margin: 0;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.project-icon {
    font-size: var(--font-size-lg);
    opacity: 0.7;
}

.github-link {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--color-text-secondary);
    text-decoration: none;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.github-link:hover {
    background: var(--gradient-primary);
    color: white;
    transform: scale(1.05);
    box-shadow: var(--shadow-button);
}

.github-link i:last-child {
    font-size: var(--font-size-xs);
}

.project-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
    line-height: var(--line-height-relaxed);
    font-size: var(--font-size-base);
    font-weight: 400;
}

.project-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.project-languages {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.language-badge {
    padding: var(--space-xs) var(--space-sm);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-sm);
    font-family: var(--font-family-mono);
    font-size: var(--font-size-xs);
    font-weight: 600;
    letter-spacing: 0.025em;
    text-transform: uppercase;
    color: var(--color-text);
    position: relative;
    overflow: hidden;
}

.language-badge::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--lang-gradient, var(--gradient-primary));
    opacity: 0.1;
    transition: opacity var(--transition-fast);
}

.language-badge:hover::before {
    opacity: 0.2;
}

/* Colori specifici per linguaggi con gradienti */
.language-badge[data-language="javascript"] {
    --lang-gradient: linear-gradient(135deg, #f7df1e, #ffeb3b);
    color: #2d2d2d;
}

.language-badge[data-language="php"] {
    --lang-gradient: linear-gradient(135deg, #777bb4, #8892bf);
    color: white;
}

.language-badge[data-language="python"] {
    --lang-gradient: linear-gradient(135deg, #3776ab, #4dabf7);
    color: white;
}

.language-badge[data-language="html"] {
    --lang-gradient: linear-gradient(135deg, #e34f26, #f16529);
    color: white;
}

.language-badge[data-language="css"] {
    --lang-gradient: linear-gradient(135deg, #1572b6, #33a9dc);
    color: white;
}

.language-badge[data-language="typescript"] {
    --lang-gradient: linear-gradient(135deg, #3178c6, #5b9bd5);
    color: white;
}

.project-stats {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.stat {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.stat i {
    font-size: var(--font-size-xs);
    color: var(--color-primary);
    filter: drop-shadow(0 1px 2px rgba(99, 102, 241, 0.3));
}

/* ==========================================================================
   No Projects State
   ========================================================================== */

.no-projects {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--color-text-secondary);
}

.no-projects i {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-lg);
    opacity: 0.5;
}

/* ==========================================================================
   Theme Toggle modernizzato
   ========================================================================== */

.theme-toggle {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: var(--gradient-primary);
    backdrop-filter: blur(20px);
    color: white;
    cursor: pointer;
    box-shadow: var(--shadow-card);
    transition: all var(--transition-fast);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-card-hover);
}

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

.footer {
    padding: var(--space-2xl) 0;
    text-align: center;
    background: linear-gradient(180deg, transparent 0%, rgba(99, 102, 241, 0.02) 100%);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.footer-links {
    margin-top: var(--space-md);
}

.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    transition: color var(--transition-fast);
}

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

/* ==========================================================================
   Scrollbar personalizzata
   ========================================================================== */

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary-dark);
}

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

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-sm);
    }

    .title {
        font-size: var(--font-size-3xl);
        flex-direction: column;
        gap: var(--space-sm);
    }

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

    .controls {
        align-items: stretch;
    }

    .search-box {
        max-width: none;
    }

    .filter-buttons {
        justify-content: flex-start;
    }

    .project-card {
        padding: var(--space-lg);
    }

    .project-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-sm);
    }

    .project-meta {
        flex-direction: column;
        align-items: flex-start;
    }

    .theme-toggle {
        bottom: var(--space-md);
        right: var(--space-md);
    }
}

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

    .main {
        padding: var(--space-xl) 0;
    }

    .project-card {
        padding: var(--space-md);
    }

    .filter-buttons {
        gap: var(--space-xs);
    }

    .filter-btn {
        padding: var(--space-xs) var(--space-sm);
        font-size: var(--font-size-xs);
    }
}