/**
 * ActProof.ai – Design System (unica fonte per token e reset)
 * Contiene: reset, variabili (:root, [data-theme="light"]), utility (flex, margin, text-*).
 * Non aggiungere qui layout di pagina o componenti specifici: usare homepage.css / dashboard.css / file feature.
 * Version: 2.0
 */

/* ============================================
   CSS RESET
   ============================================ */

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

/* ============================================
   DESIGN TOKENS - CSS VARIABLES
   ============================================ */

:root {
    /* ===== COLORS ===== */

    /* Primary Colors */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --primary-lighter: #a5b4fc;

    /* Secondary Colors */
    --secondary: #8b5cf6;
    --secondary-dark: #7c3aed;
    --secondary-light: #a78bfa;

    /* Accent Colors */
    --accent: #ec4899;
    --accent-dark: #db2777;
    --accent-light: #f472b6;

    /* Semantic Colors */
    --success: #10b981;
    --success-dark: #059669;
    --success-light: #34d399;

    --error: #ef4444;
    --error-dark: #dc2626;
    --error-light: #f87171;

    --warning: #f59e0b;
    --warning-dark: #d97706;
    --warning-light: #fbbf24;

    --info: #3b82f6;
    --info-dark: #2563eb;
    --info-light: #60a5fa;

    /* ===== DARK THEME (DEFAULT) ===== */

    /* Background Colors */
    --bg-primary: #0a0a0a;
    --bg-secondary: #141414;
    --bg-tertiary: #1f1f1f;
    --bg-quaternary: #2a2a2a;

    /* Text Colors */
    --text-primary: #f5f5f5;
    --text-secondary: #d4d4d4;
    --text-tertiary: #a3a3a3;
    --text-quaternary: #717171;

    /* Border Colors */
    --border-primary: #3a3a3a;
    --border-secondary: #2a2a2a;
    --border-tertiary: #525252;

    /* Gray Scale */
    --gray-50: #0a0a0a;
    --gray-100: #141414;
    --gray-200: #1f1f1f;
    --gray-300: #2a2a2a;
    --gray-400: #3a3a3a;
    --gray-500: #525252;
    --gray-600: #717171;
    --gray-700: #a3a3a3;
    --gray-800: #d4d4d4;
    --gray-900: #f5f5f5;

    /* ===== TYPOGRAPHY ===== */

    /* Font Families */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;

    /* Font Sizes */
    --text-xs: 0.75rem;      /* 12px */
    --text-sm: 0.875rem;     /* 14px */
    --text-base: 1rem;       /* 16px */
    --text-lg: 1.125rem;     /* 18px */
    --text-xl: 1.25rem;      /* 20px */
    --text-2xl: 1.5rem;      /* 24px */
    --text-3xl: 1.875rem;    /* 30px */
    --text-4xl: 2.25rem;     /* 36px */
    --text-5xl: 3rem;        /* 48px */

    /* Font Weights */
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;

    /* Line Heights */
    --leading-none: 1;
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;

    /* ===== SPACING ===== */

    --space-0: 0;
    --space-1: 0.25rem;      /* 4px */
    --space-2: 0.5rem;       /* 8px */
    --space-3: 0.75rem;      /* 12px */
    --space-4: 1rem;         /* 16px */
    --space-5: 1.25rem;      /* 20px */
    --space-6: 1.5rem;       /* 24px */
    --space-8: 2rem;         /* 32px */
    --space-10: 2.5rem;      /* 40px */
    --space-12: 3rem;        /* 48px */
    --space-16: 4rem;        /* 64px */
    --space-20: 5rem;        /* 80px */

    /* ===== BORDERS ===== */

    /* Border Widths */
    --border-width-0: 0;
    --border-width-1: 1px;
    --border-width-2: 2px;
    --border-width-4: 4px;

    /* Border Radius */
    --radius-none: 0;
    --radius-sm: 0.25rem;    /* 4px */
    --radius-base: 0.5rem;   /* 8px */
    --radius-md: 0.75rem;    /* 12px */
    --radius-lg: 1rem;       /* 16px */
    --radius-xl: 1.5rem;     /* 24px */
    --radius-2xl: 2rem;      /* 32px */
    --radius-full: 9999px;

    /* ===== SHADOWS - DARK MODE ===== */

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 0 20px -5px rgba(99, 102, 241, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 0 30px -5px rgba(99, 102, 241, 0.15);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.4);
    --shadow-none: 0 0 #0000;

    /* Colored Shadows */
    --shadow-primary: 0 10px 15px -3px rgba(99, 102, 241, 0.3);
    --shadow-secondary: 0 10px 15px -3px rgba(139, 92, 246, 0.3);
    --shadow-success: 0 10px 15px -3px rgba(16, 185, 129, 0.3);
    --shadow-error: 0 10px 15px -3px rgba(239, 68, 68, 0.3);
    --shadow-warning: 0 10px 15px -3px rgba(245, 158, 11, 0.3);

    /* ===== TRANSITIONS ===== */

    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slower: 500ms cubic-bezier(0.4, 0, 0.2, 1);

    /* ===== Z-INDEX LAYERS ===== */

    --z-below: -1;
    --z-base: 0;
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;

    /* ===== BREAKPOINTS (for JS use) ===== */

    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
    --breakpoint-2xl: 1536px;

    /* ===== LAYOUT ===== */

    --container-max-width: 1280px;
    --container-padding: 2rem;
}

/* ===== LIGHT THEME OVERRIDE (OPTIONAL) ===== */

[data-theme="light"] {
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --bg-quaternary: #e5e7eb;

    /* Text Colors */
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-tertiary: #6b7280;
    --text-quaternary: #9ca3af;

    /* Border Colors */
    --border-primary: #e5e7eb;
    --border-secondary: #d1d5db;
    --border-tertiary: #9ca3af;

    /* Gray Scale */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    /* Shadows - Light Mode */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
}

/* ============================================
   BASE STYLES
   ============================================ */

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

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background: var(--bg-secondary);
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

/* Display */
.hidden {
    display: none !important;
}

.block {
    display: block;
}

.inline-block {
    display: inline-block;
}

.flex {
    display: flex;
}

.inline-flex {
    display: inline-flex;
}

.grid {
    display: grid;
}

/* Flex Utilities */
.flex-row {
    flex-direction: row;
}

.flex-col {
    flex-direction: column;
}

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

.items-start {
    align-items: flex-start;
}

.items-end {
    align-items: flex-end;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

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

.justify-end {
    justify-content: flex-end;
}

.flex-wrap {
    flex-wrap: wrap;
}

.flex-1 {
    flex: 1;
}

.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* Text Alignment */
.text-left {
    text-align: left;
}

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

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

/* Font Weights */
.font-light {
    font-weight: var(--font-light);
}

.font-normal {
    font-weight: var(--font-normal);
}

.font-medium {
    font-weight: var(--font-medium);
}

.font-semibold {
    font-weight: var(--font-semibold);
}

.font-bold {
    font-weight: var(--font-bold);
}

.font-extrabold {
    font-weight: var(--font-extrabold);
}

/* Text Sizes */
.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }
.text-2xl { font-size: var(--text-2xl); }
.text-3xl { font-size: var(--text-3xl); }
.text-4xl { font-size: var(--text-4xl); }
.text-5xl { font-size: var(--text-5xl); }

/* Text Colors */
.text-primary {
    color: var(--text-primary);
}

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

.text-tertiary {
    color: var(--text-tertiary);
}

.text-success {
    color: var(--success);
}

.text-error {
    color: var(--error);
}

.text-warning {
    color: var(--warning);
}

/* Margins */
.m-0 { margin: 0; }
.m-auto { margin: auto; }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

/* Padding */
.p-0 { padding: 0; }
.p-2 { padding: var(--space-2); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

/* Border Radius */
.rounded-none { border-radius: var(--radius-none); }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded { border-radius: var(--radius-base); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-full { border-radius: var(--radius-full); }

/* Shadows */
.shadow-none { box-shadow: var(--shadow-none); }
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow { box-shadow: var(--shadow-base); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }
.shadow-2xl { box-shadow: var(--shadow-2xl); }

/* Transitions */
.transition {
    transition: all var(--transition-base);
}

.transition-fast {
    transition: all var(--transition-fast);
}

.transition-slow {
    transition: all var(--transition-slow);
}

/* Opacity */
.opacity-0 { opacity: 0; }
.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }
.opacity-100 { opacity: 1; }

/* Cursor */
.cursor-pointer {
    cursor: pointer;
}

.cursor-not-allowed {
    cursor: not-allowed;
}

/* Overflow */
.overflow-hidden {
    overflow: hidden;
}

.overflow-auto {
    overflow: auto;
}

.overflow-x-auto {
    overflow-x: auto;
}

.overflow-y-auto {
    overflow-y: auto;
}

/* Position */
.relative {
    position: relative;
}

.absolute {
    position: absolute;
}

.fixed {
    position: fixed;
}

.sticky {
    position: sticky;
}

/* Width */
.w-full {
    width: 100%;
}

.w-auto {
    width: auto;
}

/* Height */
.h-full {
    height: 100%;
}

.h-auto {
    height: auto;
}

/* Container */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

/* Focus Visible */
*:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Screen Reader Only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */

/* Mobile First Approach */
/* Default styles are for mobile (< 640px) */

/* Small devices (landscape phones, 640px and up) */
@media (min-width: 640px) {
    :root {
        --container-padding: 1.5rem;
    }
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) {
    :root {
        --container-padding: 2rem;
    }
}

/* Large devices (desktops, 1024px and up) */
@media (min-width: 1024px) {
    :root {
        --container-padding: 2rem;
    }
}

/* Extra large devices (large desktops, 1280px and up) */
@media (min-width: 1280px) {
    :root {
        --container-padding: 2rem;
    }
}