/* ============================================
   ZONZINI STAIRCLIMBERS - CSS VARIABLES
   Riferimento: DESIGN_SYSTEM.md
   ============================================ */

:root {
    /* ----------------------------------------
       COLORI - BRAND
       ---------------------------------------- */
    --color-primary: #D20A11;          /* Rosso Zonzini */
    --color-primary-dark: #B00810;     /* Rosso scuro hover */
    --color-primary-light: #E52D33;    /* Rosso chiaro */
    
    --color-secondary: #262626;        /* Grigio scuro */
    --color-secondary-light: #3D3D3D;
    
    --color-cream: #F6F5EE;            /* Crema - sfondi chiari */
    --color-success: #36AD80;          /* Verde */
    --color-accent: #E3F478;           /* Giallo */
    
    /* ----------------------------------------
       COLORI - NEUTRALI
       ---------------------------------------- */
    --color-white: #FFFFFF;
    --color-black: #000000;
    
    --color-gray-50: #FAFAFA;
    --color-gray-100: #F5F5F5;
    --color-gray-200: #EEEEEE;
    --color-gray-300: #E0E0E0;
    --color-gray-400: #BDBDBD;
    --color-gray-500: #9E9E9E;
    --color-gray-600: #757575;
    --color-gray-700: #616161;
    --color-gray-800: #424242;
    --color-gray-900: #212121;
    
    /* ----------------------------------------
       COLORI - SEMANTICI
       ---------------------------------------- */
    --color-warning: #FFC107;
    --color-error: #DC3545;
    --color-info: #17A2B8;
    
    /* ----------------------------------------
       COLORI - BACKGROUND & TEXT
       ---------------------------------------- */
    --color-bg: var(--color-white);
    --color-bg-alt: var(--color-cream);     /* Usa crema come alternativo */
    --color-bg-dark: var(--color-secondary);
    
    --color-text: var(--color-secondary);   /* Grigio come testo principale */
    --color-text-light: var(--color-gray-600);
    --color-text-muted: var(--color-gray-500);
    --color-text-inverse: var(--color-white);
    
    /* ----------------------------------------
       TIPOGRAFIA - FONT FAMILIES
       ---------------------------------------- */
    --font-primary: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-secondary: 'Noto Serif', Georgia, 'Times New Roman', serif;
    
    /* ----------------------------------------
       TIPOGRAFIA - FONT SIZES (clamp responsive)
       Formato: clamp(min, preferred, max)
       ---------------------------------------- */
    
    /* H1: 38px mobile → 130px desktop */
    --font-size-h1: clamp(2.375rem, 5vw + 1rem, 8.125rem);
    
    /* H2: 28px mobile → 100px desktop */
    --font-size-h2: clamp(1.75rem, 4vw + 0.75rem, 6.25rem);
    
    /* H3: 22px mobile → 60px desktop */
    --font-size-h3: clamp(1.375rem, 2.5vw + 0.5rem, 3.75rem);
    
    /* H4: 18px mobile → 36px desktop */
    --font-size-h4: clamp(1.125rem, 1.5vw + 0.5rem, 2.25rem);
    
    /* H5: 16px mobile → 24px desktop */
    --font-size-h5: clamp(1rem, 1vw + 0.5rem, 1.5rem);
    
    /* H6: 14px mobile → 20px desktop */
    --font-size-h6: clamp(0.875rem, 0.5vw + 0.5rem, 1.25rem);
    
    /* Paragraph: 16px mobile → 22px desktop */
    --font-size-body: clamp(1rem, 0.5vw + 0.75rem, 1.375rem);
    
    /* Small: 14px mobile → 16px desktop */
    --font-size-small: clamp(0.875rem, 0.25vw + 0.75rem, 1rem);
    
    /* Extra small: 12px mobile → 14px desktop */
    --font-size-xs: clamp(0.75rem, 0.25vw + 0.625rem, 0.875rem);
    
    /* Large text: 18px mobile → 28px desktop */
    --font-size-large: clamp(1.125rem, 0.75vw + 0.875rem, 1.75rem);
    
    /* ----------------------------------------
       TIPOGRAFIA - LINE HEIGHTS
       ---------------------------------------- */
    --line-height-tight: 0.8;
    --line-height-heading: 0.8;
    --line-height-body: 1.6;
    --line-height-loose: 1.8;
    
    /* ----------------------------------------
       TIPOGRAFIA - FONT WEIGHTS
       ---------------------------------------- */
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    --font-weight-black: 900;
    
    /* ----------------------------------------
       TIPOGRAFIA - LETTER SPACING
       ---------------------------------------- */
    --letter-spacing-tight: -0.02em;
    --letter-spacing-normal: 0;
    --letter-spacing-wide: 0.02em;
    --letter-spacing-wider: 0.05em;
    --letter-spacing-widest: 0.1em;
    
    /* ----------------------------------------
       SPAZIATURE
       ---------------------------------------- */
    --space-xs: 0.25rem;    /* 4px */
    --space-sm: 0.5rem;     /* 8px */
    --space-md: 1rem;       /* 16px */
    --space-lg: 1.5rem;     /* 24px */
    --space-xl: 2rem;       /* 32px */
    --space-2xl: 3rem;      /* 48px */
    --space-3xl: 4rem;      /* 64px */
    --space-4xl: 6rem;      /* 96px */
    --space-5xl: 8rem;      /* 128px */
    
    /* ----------------------------------------
       LAYOUT - BOXED
       ---------------------------------------- */
    --layout-margin: 30px;              /* Desktop */
    --layout-margin-mobile: 15px;       /* Mobile */
    
    --container-max-width: 1400px;
    --container-narrow: 900px;
    --container-wide: 1600px;
    
    /* ----------------------------------------
       BORDI & RADIUS
       ---------------------------------------- */
    --border-width: 1px;
    --border-width-thick: 2px;
    --border-color: var(--color-gray-200);
    --border-color-dark: var(--color-gray-400);
    
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* ----------------------------------------
       OMBRE
       ---------------------------------------- */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.25);
    
    /* ----------------------------------------
       TRANSIZIONI
       ---------------------------------------- */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    --transition-slower: 700ms ease;
    
    /* Easing curves */
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* ----------------------------------------
       Z-INDEX SCALE
       ---------------------------------------- */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-popover: 600;
    --z-tooltip: 700;
    
    /* ----------------------------------------
       HEADER
       ---------------------------------------- */
    --header-height: 80px;
    --header-height-mobile: 60px;
    
    /* ----------------------------------------
       BREAKPOINTS (per riferimento JS)
       ---------------------------------------- */
    --breakpoint-sm: 576px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 992px;
    --breakpoint-xl: 1200px;
    --breakpoint-2xl: 1400px;
}

/* ============================================
   MEDIA QUERIES - AGGIUSTAMENTI VARIABILI
   ============================================ */

@media (max-width: 768px) {
    :root {
        --layout-margin: var(--layout-margin-mobile);
        --header-height: var(--header-height-mobile);
    }
}

/* ============================================
   PREFERS REDUCED MOTION
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    :root {
        --transition-fast: 0ms;
        --transition-base: 0ms;
        --transition-slow: 0ms;
        --transition-slower: 0ms;
    }
}