/* ========================================
   SISTEMA DE DISSENY CTFC - ESPACIO DE DATOS FORESTALES
   ========================================
   Fitxer CSS base genèric per a desenvolupadors
   
   AQUEST FITXER CONTÉ:
   ✅ Variables CSS (colors, spacing, radius, transitions)
   ✅ Reset CSS i estils base
   ✅ Tipografia estandarditzada
   ✅ Elements base genèrics (.btn, .card, .grid, .container)
   ✅ Classes utilitàries (.text-center, .mb-1, .flex, etc.)
   ✅ Responsive design base
   ✅ Animacions i transicions base
   
   ÚS: Descarrega aquest fitxer i utilitza'l com a base
   per a la teva aplicació web. Afegeix les teves pròpies
   classes CSS específiques a partir d'aquí.
   ======================================== */

/* ========================================
   VARIABLES CSS - PALETA FORESTAL
   ======================================== */
:root {
    /* Paleta Principal - Colors Forestals */
    --primary-green: #3c5b40;      /* Verd Fosc - Text principal */
    --secondary-green: #688a5a;     /* Verd Secundari - Subtítols */
    --accent-green: #acc991;        /* Verd Clar - Elements secundaris */
    --accent-teal: #0ecac1;         /* Turquesa - Botons i accions */
    --accent-teal-dark: #0bb8b0;    /* Turquesa Fosc - Hover */
    --background-beige: #fcf5e9;    /* Beix - Fons */
    
    /* Colors de Text */
    --text-dark: #3c5b40;           /* Text principal */
    --text-medium: #688a5a;         /* Text secundari */
    --white: #ffffff;                /* Blanc */
    
    /* Ombres i Transparències */
    --shadow-light: rgba(60, 91, 64, 0.1);
    --shadow-medium: rgba(0, 0, 0, 0.1);
    --shadow-dark: rgba(0, 0, 0, 0.15);
    
    /* Transicions */
    --transition-normal: 0.3s ease;
    --transition-slow: 0.4s ease;
    
    /* Border Radius */
    --radius-sm: 15px;
    --radius-md: 18px;
    --radius-lg: 20px;
    --radius-xl: 25px;
    --radius-full: 30px;
    
    /* Espaiat */
    --spacing-xs: 10px;
    --spacing-sm: 15px;
    --spacing-md: 20px;
    --spacing-lg: 25px;
    --spacing-xl: 30px;
    --spacing-2xl: 35px;
    --spacing-3xl: 40px;
    --spacing-4xl: 60px;
}

/* ========================================
   RESET I BASE
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-beige);
    color: var(--text-dark);
    line-height: 1.6;
    padding: var(--spacing-md);
    min-height: 100vh;
}

/* ========================================
   TIPOGRAFIA
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-md);
    font-weight: 800;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
    text-align: center;
    color: var(--text-dark);
}

h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

p {
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

a {
    color: var(--accent-teal);
    text-decoration: none;
    transition: color var(--transition-normal);
}

a:hover {
    color: var(--accent-teal-dark);
}

/* ========================================
   ELEMENTS BASE GENÈRICS
   ======================================== */

/* Botons base */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.95rem;
    text-decoration: none;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: center;
    min-height: 44px;
}

.btn:focus {
    outline: 2px solid var(--accent-teal);
    outline-offset: 2px;
}

/* Cards base */
.card {
    background: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 10px 30px var(--shadow-medium);
    transition: all var(--transition-slow);
    border: 3px solid transparent;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 50px var(--shadow-dark);
    border-color: var(--accent-teal);
}

/* Grid base */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

.grid-cols-auto-fit { grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); }
.grid-cols-auto-fill { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }

/* Layout base */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-fluid {
    max-width: 100%;
    margin: 0;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-4xl) var(--spacing-3xl);
}

.section-sm {
    padding: var(--spacing-2xl) var(--spacing-xl);
}

.section-lg {
    padding: var(--spacing-4xl) var(--spacing-3xl);
}

/* ========================================
   UTILITATS
   ======================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }
.p-5 { padding: var(--spacing-xl); }

.hidden { display: none; }
.visible { display: block; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }

/* ========================================
   RESPONSIVE DESIGN BASE
   ======================================== */
@media (max-width: 768px) {
    body {
        padding: var(--spacing-sm);
    }
    
    h1 {
        font-size: 2.8rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    h3 {
        font-size: 1.6rem;
    }
    
    .section {
        padding: var(--spacing-2xl) var(--spacing-lg);
    }
    
    .section-sm {
        padding: var(--spacing-xl) var(--spacing-lg);
    }
    
    .section-lg {
        padding: var(--spacing-2xl) var(--spacing-lg);
    }
    
    .grid-cols-auto-fit,
    .grid-cols-auto-fill {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2.4rem;
    }
    
    h2 {
        font-size: 1.6rem;
    }
    
    h3 {
        font-size: 1.4rem;
    }
    
    .section {
        padding: var(--spacing-xl) var(--spacing-md);
    }
    
    .section-sm {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .section-lg {
        padding: var(--spacing-xl) var(--spacing-md);
    }
}

/* ========================================
   ANIMACIONS I TRANSICIONS
   ======================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        transform: translateX(-100%);
    }
    to {
        transform: translateX(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

.slide-in {
    animation: slideIn 0.5s ease-out;
}

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

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

/* Focus visible per a navegació per teclat */
button:focus-visible,
a:focus-visible {
    outline: 2px solid var(--accent-teal);
    outline-offset: 2px;
}

/* ========================================
   PRINT STYLES
   ======================================== */
@media print {
    * {
        background: transparent !important;
        color: black !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }
    
    .project-card {
        break-inside: avoid;
        page-break-inside: avoid;
    }
    
    .back-button {
        display: none;
    }
}