/* ============================================
   FantaReporter Design System - base.css
   Reset, variabili CSS, tipografia
   ============================================ */

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

html {
    height: 100%;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    min-height: 100%;
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: 1.5;
    color: var(--color-gray-800);
    background-color: var(--surface-secondary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }
table { border-collapse: collapse; width: 100%; }

/* --- CSS Variables --- */
:root {
    /* Brand red scale */
    --color-primary-50:  #fef2f2;
    --color-primary-100: #fee2e2;
    --color-primary-200: #fecaca;
    --color-primary-300: #fca5a5;
    --color-primary-400: #f87171;
    --color-primary-500: #ef4444;
    --color-primary-600: #dc2626;
    --color-primary-700: #b91c1c;
    --color-primary-800: #991b1b;
    --color-primary-900: #7f1d1d;

    /* Warm gray scale */
    --color-gray-50:  #fafaf9;
    --color-gray-100: #f5f5f4;
    --color-gray-200: #e7e5e4;
    --color-gray-300: #d6d3d1;
    --color-gray-400: #a8a29e;
    --color-gray-500: #78716c;
    --color-gray-600: #57534e;
    --color-gray-700: #44403c;
    --color-gray-800: #292524;
    --color-gray-900: #1c1917;

    /* Semantic colors */
    --color-success: #16a34a;
    --color-success-light: #dcfce7;
    --color-warning: #d97706;
    --color-warning-light: #fef3c7;
    --color-error: #dc2626;
    --color-error-light: #fee2e2;
    --color-info: #2563eb;
    --color-info-light: #dbeafe;

    /* Surfaces */
    --surface-primary: #ffffff;
    --surface-secondary: #fafaf9;
    --surface-elevated: #ffffff;
    --surface-overlay: rgba(0, 0, 0, 0.4);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Playfair Display', Georgia, serif;

    --text-xs:   0.75rem;
    --text-sm:   0.875rem;
    --text-base: 1rem;
    --text-lg:   1.125rem;
    --text-xl:   1.25rem;
    --text-2xl:  1.5rem;
    --text-3xl:  1.875rem;

    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;

    /* Spacing (4px base) */
    --space-0:  0;
    --space-1:  0.25rem;
    --space-2:  0.5rem;
    --space-3:  0.75rem;
    --space-4:  1rem;
    --space-5:  1.25rem;
    --space-6:  1.5rem;
    --space-8:  2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);

    /* Border radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;

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

    /* Z-index scale */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-modal-backdrop: 300;
    --z-modal: 400;
    --z-toast: 500;
    --z-bottomnav: 250;

    /* Layout */
    --container-max: 1200px;
    --header-height: 56px;
    --bottomnav-height: 56px;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-semibold);
    line-height: 1.3;
    color: var(--color-gray-900);
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }
h5 { font-size: var(--text-base); }

p {
    color: var(--color-gray-600);
    line-height: 1.6;
}

small {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
}

/* --- Selection --- */
::selection {
    background-color: var(--color-primary-100);
    color: var(--color-primary-900);
}

/* --- Focus visible --- */
:focus-visible {
    outline: 2px solid var(--color-primary-500);
    outline-offset: 2px;
}

/* --- Scrollbar (subtle) --- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: var(--color-gray-300);
    border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover { background: var(--color-gray-400); }