/* 
  HEDRA TOPOGRAFÍA - CSS UNIFICADO V2.0
  Fusión de design-system.css + screen.css
*/

/* ===================================
   TRANSICIONES MPA
   =================================== */
@view-transition {
    navigation: auto;
}

/* ===================================
   VARIABLES CSS (Design Tokens)
   =================================== */
:root {
    /* Colores Corporativos */
    --hedra-red: #ec414a;
    --hedra-red-dark: #d63640;
    --hedra-red-light: #f56870;
    --hedra-green: #86C124;
    --hedra-green-dark: #6fa51e;
    --hedra-green-light: #9dd13e;
    --hedra-link: #0066cc;
    --hedra-link-visited: #6281A3;
    --hedra-link-hover: #182E7A;

    /* Escala de Grises */
    --hedra-dark: #1A1A1A;
    --hedra-gray-900: #222222;
    --hedra-gray-800: #2D2D2D;
    --hedra-gray-700: #444444;
    --hedra-gray-600: #666666;
    --hedra-gray-500: #888888;
    --hedra-gray-400: #999999;
    --hedra-gray-300: #BBBBBB;
    --hedra-gray-200: #E0E0E0;
    --hedra-gray-100: #F5F5F5;
    --hedra-white: #FFFFFF;

    /* Fondos */
    --hedra-bg-body: #FFFFFF;
    --hedra-bg-light: #F8F9FA;
    --hedra-bg-teaser: #F1F2F2;
    --hedra-bg-section-alt: #FAFAFA;

    /* Funcionales */
    --hedra-success: #28a745;
    --hedra-warning: #ffc107;
    --hedra-danger: #dc3545;
    --hedra-info: #17a2b8;

    /* Tipografía */
    --font-primary: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-headings: var(--font-primary);
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;

    --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;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;

    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-black: 900;

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

    /* Espaciado (sistema 4px) */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-7: 1.75rem;
    --space-8: 2rem;
    --space-9: 2.25rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-14: 3.5rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    --space-32: 8rem;

    /* Radios */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    --border-width: 1px;
    --border-width-2: 2px;

    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

    /* Transiciones */
    --transition-fast: 150ms;
    --transition-base: 200ms;
    --transition-slow: 300ms;
    --ease-out: cubic-bezier(0, 0, 0.2, 1);

    /* Z-index */
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-tooltip: 1070;
}

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

/* ===================================
   BASE
   =================================== */
html {
    font-size: 100%;
    height: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    background: var(--hedra-bg-body) url("../images/bg-body.png") repeat-x top left;
    color: var(--hedra-dark);
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
    text-align: left;
    min-height: 100vh;
}

/* ===================================
   TIPOGRAFÍA
   =================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-headings);
    font-weight: var(--font-semibold);
    line-height: var(--leading-tight);
    color: var(--hedra-dark);
    margin-bottom: var(--space-4);
}

h1 {
    font-size: var(--text-5xl);
    font-weight: var(--font-bold);
    color: var(--hedra-green);
    line-height: var(--leading-none);
    letter-spacing: -0.02em;
}

h2 {
    font-size: 180%;
    font-weight: var(--font-bold);
    letter-spacing: -0.01em;
}

h3 {
    font-size: 130%;
    font-weight: var(--font-semibold);
    background-color: var(--hedra-red);
    color: var(--hedra-white);
    padding: 2px 6px;
    border-radius: 4px;
    display: block;
    margin-bottom: 0.7em;
}

h4 {
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
}

h5 {
    font-size: var(--text-lg);
    font-weight: var(--font-medium);
}

h6 {
    font-size: var(--text-base);
    font-weight: var(--font-medium);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

p {
    margin-bottom: var(--space-4);
    color: var(--hedra-gray-700);
}

p:last-child {
    margin-bottom: 0;
}

strong, b {
    font-weight: var(--font-semibold);
    color: var(--hedra-dark);
}

.lead {
    font-size: var(--text-lg);
    color: var(--hedra-gray-600);
    line-height: var(--leading-relaxed);
}

small, .text-sm {
    font-size: var(--text-sm);
}

.pie {
    font-size: 85%;
    margin-bottom: 10px;
    display: block;
}

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

/* ===================================
   ENLACES
   =================================== */
a {
    color: var(--hedra-link);
    text-decoration: none;
    transition: color var(--transition-base) var(--ease-out);
    cursor: pointer;
}

a:visited {
    color: var(--hedra-link-visited);
}

a:hover, a:focus {
    color: var(--hedra-link-hover);
    text-decoration: underline;
}

a:focus {
    outline: 2px solid var(--hedra-link);
    outline-offset: 2px;
}

/* ===================================
   IMÁGENES
   =================================== */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

img.logo {
    margin: 10px auto 20px auto;
    height: 64px;
    width: auto;
}

/* ===================================
   LISTAS
   =================================== */
ul, ol {
    list-style: none;
    display: flow-root;
    margin-bottom: 20px;
}

main ul li {
    background-color: #f9f9f9;
    padding: 5px 15px;
}

main ul li:not(:last-child) {
    border-bottom: 2px solid #eee;
}

/* ===================================
   SKIP LINKS (accesibilidad)
   =================================== */
.skip {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: var(--z-tooltip);
    padding: var(--space-3) var(--space-4);
    background: var(--hedra-dark);
    color: var(--hedra-white);
    text-decoration: none;
    border-radius: var(--radius-md);
}

.skip:focus {
    left: var(--space-4);
    top: var(--space-4);
    outline: 2px solid var(--hedra-link);
}

/* ===================================
   LAYOUT: PÁGINA
   =================================== */
#page_margins {
    margin: 0 auto;
    max-width: 960px;
}

#page {
    padding: 10px;
}

div.foto {
    border: 1px solid #F1F2F2;
    padding: 4px;
    text-align: center;
    clear: both;
    margin: 0 0 20px;
}

.right {
    float: right;
}

/* ===================================
   CABECERA
   =================================== */
header#header {
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) var(--space-5);
    color: var(--hedra-green);
}

.header-logo {
    flex: 0 0 auto;
}

.header-cta {
    flex: 0 0 auto;
    margin-left: auto;
    margin-right: var(--space-4);
}

/* ===================================
   NAVEGACIÓN
   =================================== */
nav#nav {
    overflow: hidden;
    position: relative;
    z-index: calc(var(--z-sticky) - 1);
    background: silver url(../images/bg-nav.png) repeat-x center right;
    border-radius: 10px;
}

nav#nav ul {
    display: flex;
    margin: 0;
    padding: 0 0 0 50px;
}

nav#nav li {
    display: inline-block;
    border-left: 1px solid #fafafa;
    border-right: 1px solid #aaa;
    font-size: 1em;
    line-height: 1em;
    text-shadow: 0 1px 0 #ddd;
}

nav#nav li a {
    display: block;
    color: #444;
    padding: 14px;
}

nav#nav li a:hover {
    background: #eee;
    color: #333;
    text-decoration: none;
}

nav#nav li.active,
nav#nav li.active a {
    background: #999;
    color: #fff;
    text-shadow: none;
}

/* Hamburger */
#hamburger {
    display: none;
    width: 50px;
    height: 50px;
    background-color: #F1F2F2;
    border-radius: 50%;
    border: none;
    font-size: 2em;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: absolute;
    top: 50%;
    left: 10px;
    transform: translateY(50%);
    z-index: 1000;
}

/* Close button */
#close-menu {
    display: none;
    position: absolute;
    top: 10px;
    right: 10px;
    width: 30px;
    height: 30px;
    background: var(--hedra-bg-teaser);
    border: none;
    border-radius: 50%;
    font-size: 1em;
    cursor: pointer;
    color: var(--hedra-gray-700);
    align-items: center;
    justify-content: center;
    padding: 0;
    z-index: 1200;
    line-height: 1;
}

/* ===================================
   TEASER
   =================================== */
#teaser {
    clear: both;
    margin: 10px 0;
    border-radius: 10px;
    padding: 30px 30px 20px 460px;
}

.teaser_index {
    background: var(--hedra-bg-teaser) url(../images/teaser-plano.png) no-repeat 0 10px;
}

.teaser_actividades {
    background: var(--hedra-bg-teaser) url(../images/teaser-excavadora.png) no-repeat scroll left bottom;
}

.teaser_contacto {
    background: var(--hedra-bg-teaser) url(../images/teaser-carta.jpg) no-repeat 0 10px;
}

/* ===================================
   MAIN (columnas)
   =================================== */
main#main {
    background: #fff;
    margin: 30px 0;
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: space-between;
}

main#main > section.columna3 {
    width: 30%;
}

main#main > section.columna2 {
    width: 48%;
}

main#main > section.columna1 {
    width: 100%;
}

/* ===================================
   FOOTER
   =================================== */
footer#footer {
    background: var(--hedra-gray-100);
    border-top: 5px solid #ddd;
    color: var(--hedra-gray-700);
    padding: var(--space-8) var(--space-5);
    border-radius: 10px;
    margin-top: var(--space-12);
    text-align: center;
}

#credits {
    padding: 0;
    color: var(--hedra-gray-600);
    font-size: var(--text-sm);
}

/* ===================================
   SISTEMA DE BOTONES
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    font-family: var(--font-primary);
    font-weight: var(--font-medium);
    text-align: center;
    text-decoration: none;
    white-space: nowrap;
    cursor: pointer;
    user-select: none;
    border: var(--border-width-2) solid transparent;
    border-radius: var(--radius-md);
    transition: all var(--transition-base) var(--ease-out);
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-base);
    line-height: var(--leading-tight);
}

.btn-primary {
    background-color: var(--hedra-red);
    color: var(--hedra-white);
    border-color: var(--hedra-red);
}

.btn-primary:hover {
    background-color: var(--hedra-red-dark);
    border-color: var(--hedra-red-dark);
    color: var(--hedra-white);
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-primary:focus {
    outline: 2px solid var(--hedra-red);
    outline-offset: 2px;
    color: var(--hedra-white);
}

.btn-primary:active {
    background-color: var(--hedra-red-dark);
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.btn-secondary {
    background-color: var(--hedra-green);
    color: var(--hedra-white);
    border-color: var(--hedra-green);
}

.btn-secondary:hover {
    background-color: var(--hedra-green-dark);
    color: var(--hedra-white);
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-small {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
}

.btn-large {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-lg);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* ===================================
   RESPONSIVE: MÓVIL (≤768px)
   =================================== */
@media screen and (max-width: 768px) {
    #page_margins {
        width: 100%;
        padding: 0 10px;
    }

    body {
        font-size: 1em;
    }

    #hamburger {
        display: flex;
        position: absolute;
        top: 10px;
        left: 10px;
    }

    nav#nav .menu {
        position: fixed;
        top: 0;
        left: -250px;
        width: 250px;
        height: 100%;
        background: #eee;
        overflow-y: auto;
        transition: left 0.3s ease;
        z-index: 1100;
        padding-top: 20px;
    }

    nav#nav .menu.open {
        left: 0;
    }

    nav#nav .menu.open #close-menu {
        display: flex;
    }

    nav#nav ul {
        display: block;
        padding: 40px 0 0 0;
    }

    nav#nav li {
        display: block;
        border: none;
        padding: 10px 20px;
        border-bottom: 1px solid #ddd;
        text-shadow: none;
    }

    #teaser {
        background: var(--hedra-bg-teaser);
        padding: 20px;
    }

    #teaser.teaser_index,
    #teaser.teaser_contacto {
        position: relative;
        background: var(--hedra-bg-teaser);
        padding: 20px;
        overflow: hidden;
        padding-bottom: 62.5%;
    }

    #teaser.teaser_index::before {
        content: "";
        display: block;
        padding-bottom: 62.5%;
        background: url(../images/teaser-plano.png) no-repeat left top;
        background-size: cover;
        width: 100%;
        position: absolute;
        bottom: 0;
        left: 0;
    }

    #teaser.teaser_contacto::before {
        content: "";
        display: block;
        padding-bottom: 62.5%;
        background: url(../images/teaser-carta.jpg) no-repeat left top;
        background-size: cover;
        width: 100%;
        position: absolute;
        bottom: 0;
        left: 0;
    }

    #teaser.teaser_actividades {
        padding-bottom: 40%;
        background: var(--hedra-bg-teaser) url(../images/teaser-excavadora.png) no-repeat scroll left bottom;
        background-size: contain;
    }

    main#main {
        flex-direction: column;
        margin: 20px 0;
    }

    main#main > section.columna3,
    main#main > section.columna2 {
        width: 100%;
        padding: 10px 0;
    }

    div.foto {
        width: 100%;
        margin: 0 0 10px;
    }

    header#header {
        padding: var(--space-3);
        padding-left: 70px;
        gap: var(--space-3);
    }

    .header-logo {
        flex: 1;
        display: flex;
        justify-content: center;
    }

    img.logo {
        height: 48px;
        max-height: 48px;
    }

    .header-cta {
        margin-right: 0;
        flex-shrink: 0;
        width: auto;
    }

    .btn-small {
        padding: var(--space-2) var(--space-3);
        font-size: var(--text-xs);
    }

    .envelope-icon {
        display: none;
    }

    footer#footer {
        padding: var(--space-6) var(--space-4);
    }

    #credits {
        font-size: var(--text-xs);
    }
}

/* ===================================
   RESPONSIVE: ESCRITORIO (>768px)
   =================================== */
@media (min-width: 768px) {
    h1 {
        font-size: var(--text-6xl);
    }

    .lead {
        font-size: var(--text-xl);
    }
}