/**
 * ========================================
 * ATTAL GROUP - CSS VARIABLES
 * ========================================
 * Sistema di design unificato per tutti i componenti
 * del progetto ATTAL. Questo file contiene tutte le
 * variabili CSS personalizzate utilizzate nell'applicazione.
 */

:root {
    /* ========================================
     * COLORI PRIMARI
     * ======================================== */

    /* Rosso ATTAL - Colore principale del brand */
    --attal-red: #e22721;
    --attal-red-dark: #c91f1a;
    --attal-red-light: #fee2e2;
    --attal-red-lighter: #fef3f2;

    /* Gradiente brand */
    --gradient-primary: linear-gradient(135deg, #e22721, #c91f1a);
    --gradient-primary-reverse: linear-gradient(180deg, #e22721, #c91f1a);
    --gradient-primary-soft: linear-gradient(180deg, #e22721, #fee2e2);

    /* ========================================
     * SCALA DI GRIGI
     * ======================================== */

    --gray-900: #111827;  /* Dark - Testi primari scuri */
    --gray-800: #1f2937;  /* Testi primari, headers */
    --gray-700: #374151;  /* Testi secondari */
    --gray-600: #4b5563;  /* Testi meno enfatizzati */
    --gray-500: #6b7280;  /* Testi terziari, labels */
    --gray-400: #9ca3af;  /* Placeholder, disabled */
    --gray-300: #d1d5db;  /* Borders, dividers */
    --gray-200: #e5e7eb;  /* Borders light */
    --gray-100: #f3f4f6;  /* Background light */
    --gray-50: #f9fafb;   /* Background extra light */

    /* Bianco e nero */
    --white: #ffffff;
    --black: #000000;

    /* ========================================
     * COLORI DI STATO
     * ======================================== */

    /* Success - Verde */
    --success: #10b981;
    --success-dark: #059669;
    --success-light: #d1fae5;

    /* Warning - Arancione/Giallo */
    --warning: #f59e0b;
    --warning-dark: #d97706;
    --warning-light: #fef3c7;

    /* Error - Rosso */
    --error: #ef4444;
    --error-dark: #dc2626;
    --error-light: #fee2e2;

    /* Info - Blu */
    --info: #3b82f6;
    --info-dark: #2563eb;
    --info-light: #dbeafe;

    /* ========================================
     * COLORI SPECIALI
     * ======================================== */

    /* Purple/Violet - AI/Tech features */
    --purple: #8b5cf6;
    --purple-dark: #7c3aed;
    --purple-light: #ede9fe;

    /* Ally Widget (verde secondario) */
    --ally-green: #00a884;
    --ally-green-dark: #008c6d;
    --ally-green-light: #d1f4e8;

    /* Star rating - Giallo oro */
    --star-gold: #fbbf24;
    --star-gold-dark: #f59e0b;

    /* ========================================
     * FONT FAMILIES
     * ======================================== */

    /* Font principale - DM Sans con fallback */
    --font-primary: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

    /* Font di sistema (per performance) */
    --font-system: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

    /* Font monospace (per codice) */
    --font-mono: 'SF Mono', 'Monaco', 'Cascadia Code', 'Roboto Mono', 'Courier New', monospace;

    /* ========================================
     * FONT SIZES
     * ======================================== */

    --font-xs: 12px;      /* Extra small */
    --font-sm: 14px;      /* Small */
    --font-base: 16px;    /* Base/default */
    --font-lg: 18px;      /* Large */
    --font-xl: 20px;      /* Extra large */
    --font-2xl: 24px;     /* 2X large */
    --font-3xl: 28px;     /* 3X large */
    --font-4xl: 32px;     /* 4X large */
    --font-5xl: 36px;     /* 5X large */
    --font-6xl: 48px;     /* 6X large - Hero */

    /* ========================================
     * 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: 1.2;
    --leading-snug: 1.4;
    --leading-normal: 1.6;
    --leading-relaxed: 1.8;
    --leading-loose: 2;

    /* ========================================
     * SPACING SCALE (4px base)
     * ======================================== */

    --space-0: 0;
    --space-1: 4px;       /* 4px */
    --space-2: 8px;       /* 8px */
    --space-3: 12px;      /* 12px */
    --space-4: 16px;      /* 16px */
    --space-5: 20px;      /* 20px */
    --space-6: 24px;      /* 24px */
    --space-7: 28px;      /* 28px */
    --space-8: 32px;      /* 32px */
    --space-9: 36px;      /* 36px */
    --space-10: 40px;     /* 40px */
    --space-11: 44px;     /* 44px */
    --space-12: 48px;     /* 48px */
    --space-14: 56px;     /* 56px */
    --space-16: 64px;     /* 64px */
    --space-20: 80px;     /* 80px */
    --space-24: 96px;     /* 96px */
    --space-28: 112px;    /* 112px */
    --space-32: 128px;    /* 128px */

    /* ========================================
     * BORDER RADIUS
     * ======================================== */

    --radius-none: 0;
    --radius-sm: 4px;     /* Small - Input, buttons piccoli */
    --radius-md: 8px;     /* Medium - Card, buttons standard */
    --radius-lg: 12px;    /* Large - Card grandi, modali */
    --radius-xl: 16px;    /* Extra large - Feature cards */
    --radius-2xl: 24px;   /* 2X large - Container principali */
    --radius-3xl: 32px;   /* 3X large - Hero sections */
    --radius-full: 9999px; /* Pill/circle - Badges, avatar */

    /* ========================================
     * BORDER WIDTHS
     * ======================================== */

    --border-1: 1px;
    --border-2: 2px;
    --border-3: 3px;
    --border-4: 4px;

    /* ========================================
     * SHADOWS
     * ======================================== */

    /* Shadows standard */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.05), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15), 0 10px 10px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.25);

    /* Shadows con colore brand */
    --shadow-red-sm: 0 4px 12px rgba(226, 39, 33, 0.25);
    --shadow-red-md: 0 5px 15px rgba(226, 39, 33, 0.3);
    --shadow-red-lg: 0 6px 20px rgba(226, 39, 33, 0.3);

    /* Shadow purple per AI features */
    --shadow-purple-sm: 0 4px 15px rgba(139, 92, 246, 0.25);
    --shadow-purple-md: 0 4px 20px rgba(139, 92, 246, 0.4);
    --shadow-purple-lg: 0 6px 30px rgba(139, 92, 246, 0.5);

    /* Shadow per elevazione */
    --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-outline: 0 0 0 3px rgba(226, 39, 33, 0.1);
    --shadow-outline-purple: 0 0 0 2px rgba(139, 92, 246, 0.2);

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

    /* Durate */
    --duration-fastest: 0.1s;
    --duration-fast: 0.15s;
    --duration-normal: 0.2s;
    --duration-medium: 0.3s;
    --duration-slow: 0.4s;
    --duration-slowest: 0.6s;

    /* Easing curves */
    --ease-linear: linear;
    --ease-in: ease-in;
    --ease-out: ease-out;
    --ease-in-out: ease-in-out;

    /* Transition preset completi */
    --transition-fastest: 0.1s ease;
    --transition-fast: 0.15s ease;
    --transition-normal: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.4s ease;
    --transition-slowest: 0.6s ease;

    /* Transition specifiche */
    --transition-all: all 0.2s ease;
    --transition-colors: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
    --transition-transform: transform 0.2s ease;
    --transition-opacity: opacity 0.2s ease;

    /* ========================================
     * Z-INDEX SCALE
     * ======================================== */

    --z-base: 0;          /* Base layer */
    --z-dropdown: 100;    /* Dropdown menus */
    --z-sticky: 200;      /* Sticky header/nav */
    --z-fixed: 300;       /* Fixed positioned elements */
    --z-overlay: 400;     /* Overlay backgrounds */
    --z-modal: 1000;      /* Modal dialogs */
    --z-popover: 1100;    /* Popovers, tooltips */
    --z-toast: 1200;      /* Toast notifications */
    --z-tooltip: 1300;    /* Tooltips (highest) */

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

    --breakpoint-xs: 320px;
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
    --breakpoint-2xl: 1536px;

    /* ========================================
     * CONTAINER WIDTHS
     * ======================================== */

    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1200px;
    --container-2xl: 1400px;

    /* ========================================
     * OPACITÀ
     * ======================================== */

    --opacity-0: 0;
    --opacity-10: 0.1;
    --opacity-20: 0.2;
    --opacity-30: 0.3;
    --opacity-40: 0.4;
    --opacity-50: 0.5;
    --opacity-60: 0.6;
    --opacity-70: 0.7;
    --opacity-80: 0.8;
    --opacity-90: 0.9;
    --opacity-100: 1;

    /* ========================================
     * MISURE COMUNI
     * ======================================== */

    /* Header */
    --header-height: 72px;
    --header-height-mobile: 64px;

    /* Footer */
    --footer-height: auto;

    /* Sidebar */
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 80px;

    /* Input heights */
    --input-height-sm: 32px;
    --input-height-md: 40px;
    --input-height-lg: 48px;

    /* Button heights */
    --button-height-sm: 32px;
    --button-height-md: 40px;
    --button-height-lg: 48px;
    --button-height-xl: 56px;

    /* ========================================
     * GRADIENTI DECORATIVI
     * ======================================== */

    --gradient-dark: linear-gradient(135deg, #1f2937 0%, #111827 100%);
    --gradient-light: linear-gradient(135deg, #f9fafb 0%, #ffffff 100%);
    --gradient-gray: linear-gradient(180deg, #f8f9fa 0%, #e9ecef 100%);

    /* Gradienti overlay */
    --gradient-overlay-dark: linear-gradient(to bottom, transparent, rgba(0, 0, 0, 0.7));
    --gradient-overlay-light: linear-gradient(to bottom, transparent, rgba(255, 255, 255, 0.7));
}

/* ========================================
 * UTILITY CLASSES
 * ========================================
 * Classi utility per applicare rapidamente
 * le variabili CSS ai componenti
 */

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

/* Temi (per future implementazioni dark mode) */
:root[data-theme="light"] {
    --bg-primary: var(--white);
    --bg-secondary: var(--gray-50);
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-600);
    --border-color: var(--gray-200);
}

:root[data-theme="dark"] {
    --bg-primary: var(--gray-900);
    --bg-secondary: var(--gray-800);
    --text-primary: var(--white);
    --text-secondary: var(--gray-300);
    --border-color: var(--gray-700);
}