/* ============================================
   MOBILE-FIRST CSS ARCHITECTURE
   Disena Digitals - Minimalistic Design
   ============================================ */

/* ============================================
   SPACING SYSTEM (8px base)
   ============================================ */
:root {
  --spacing-xs: 0.5rem;    /* 8px */
  --spacing-sm: 1rem;      /* 16px */
  --spacing-md: 1.5rem;     /* 24px */
  --spacing-lg: 2rem;      /* 32px */
  --spacing-xl: 3rem;      /* 48px */
  --spacing-xxl: 4.5rem;   /* 72px */
  
  /* Colors */
  --color-bg: #ffffff;
  --color-light: #f8f9fa;
  --color-dark: #222831;
  --color-accent: #00ADB5;
  --color-grey: #6b7280;
  --color-border: #e5e7eb;
  
  /* Typography */
  --font-main: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
  
  /* Container */
  --container-max-width: 100%;
  --container-padding: var(--spacing-sm);
}

/* ============================================
   RESET & BASE STYLES (MOBILE FIRST)
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-main);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-dark);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   TYPOGRAPHY (MOBILE-FIRST SCALE)
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--spacing-md) 0;
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-dark);
  letter-spacing: -0.02em;
}

h1 {
  font-size: 1.8rem;
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
  max-width: 100%;
}

h2 {
  font-size: 1.5rem;
  line-height: 1.4;
  margin-bottom: var(--spacing-md);
  max-width: 100%;
}

h3 {
  font-size: 1.2rem;
  line-height: 1.4;
  margin-bottom: var(--spacing-sm);
}

h4 {
  font-size: 1.1rem;
  line-height: 1.4;
  margin-bottom: var(--spacing-sm);
}

p {
  margin: 0 0 var(--spacing-sm) 0;
  color: var(--color-grey);
  line-height: 1.7;
  max-width: 65ch;
}

.lead {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--color-grey);
  margin-bottom: var(--spacing-lg);
}

/* ============================================
   CONTAINERS & LAYOUT
   ============================================ */
.container {
  width: 100%;
  max-width: 650px;
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* Content containers with max-width for readability */
.content-container {
  max-width: 600px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

.section-container {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

/* ============================================
   SECTIONS (MOBILE SPACING)
   ============================================ */
section {
  padding: var(--spacing-xl) 0;
  width: 100%;
  margin-bottom: var(--spacing-lg);
}

section:first-of-type {
  padding-top: calc(var(--spacing-xl) + 70px); /* Account for fixed navbar */
}

/* ============================================
   HEADER & NAVIGATION (MOBILE-FIRST)
   ============================================ */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-sm) 0;
}

#navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: nowrap;
}

.navbar-brand {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-dark);
  text-decoration: none;
  padding: var(--spacing-xs) 0;
  transition: color 0.2s;
}

.navbar-brand:hover,
.navbar-brand:focus {
  color: var(--color-accent);
  outline: none;
}

/* Hamburger Toggle Button */
.nav-toggle {
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  padding: var(--spacing-xs);
  cursor: pointer;
  border-radius: 0.25rem;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s;
}

.nav-toggle:hover {
  background: var(--color-light);
}

.nav-toggle:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.nav-toggle[aria-expanded="true"] {
  background: var(--color-light);
}

/* Hamburger Icon */
.hamburger-icon {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 20px;
  height: 16px;
}

.hamburger-icon span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-dark);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.nav-toggle[aria-expanded="true"] .hamburger-icon span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.nav-toggle[aria-expanded="true"] .hamburger-icon span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .hamburger-icon span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* Mobile Navigation Menu */
.mobile-nav {
  display: none;
  width: 100%;
  margin-top: var(--spacing-sm);
  padding: var(--spacing-md) 0;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.mobile-nav.open {
  display: block;
  animation: slideDown 0.3s ease;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
  width: 100%;
}

.nav-item {
  border-top: 1px solid var(--color-border);
}

.nav-item:first-child {
  border-top: none;
}

.nav-link {
  display: block;
  padding: var(--spacing-sm) 0;
  color: var(--color-dark);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s;
  min-height: 44px;
  display: flex;
  align-items: center;
}

.nav-link:hover,
.nav-link:focus {
  color: var(--color-accent);
  outline: none;
}

.nav-link.active {
  color: var(--color-accent);
  font-weight: 600;
}

/* ============================================
   HERO SECTION
   ============================================ */
#hero {
  min-height: auto;
  padding: var(--spacing-xxl) 0;
  background: var(--color-light);
}

#hero .container {
  max-width: 600px;
}

#hero h1 {
  margin-bottom: var(--spacing-md);
}

#hero .lead {
  margin-bottom: var(--spacing-lg);
}

#hero img {
  width: 100%;
  max-width: 100%;
  height: auto;
  margin-top: var(--spacing-lg);
  border-radius: 0;
}

/* ============================================
   BUTTONS (MOBILE-FIRST)
   ============================================ */
.btn {
  display: inline-block;
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  margin-top: var(--spacing-sm);
  font-size: 1rem;
  font-weight: 500;
  text-align: center;
  text-decoration: none;
  border: none;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: background-color 0.2s;
}

.btn-accent {
  background: var(--color-accent);
  color: #ffffff;
}

.btn-accent:hover,
.btn-accent:focus {
  background: #068189;
  color: #ffffff;
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 1.05rem;
}

/* ============================================
   CARDS (MINIMALISTIC - NO SHADOWS)
   ============================================ */
.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  transition: none;
}

.card:hover {
  border-color: var(--color-accent);
}

.card h3,
.card h4,
.card h5 {
  margin-top: 0;
}

.card p {
  margin-bottom: 0;
}

/* ============================================
   GRID LAYOUTS (MOBILE-FIRST)
   ============================================ */
.row {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin: 0;
}

.col-12 {
  width: 100%;
}

/* ============================================
   FORMS (MOBILE-FIRST)
   ============================================ */
form {
  width: 100%;
  max-width: 600px;
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
  color: var(--color-dark);
  font-size: 0.95rem;
}

.form-control {
  width: 100%;
  padding: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-dark);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  transition: border-color 0.2s;
}

.form-control:focus {
  outline: none;
  border-color: var(--color-accent);
}

textarea.form-control {
  min-height: 120px;
  resize: vertical;
}

#form-result {
  margin-top: var(--spacing-sm);
  font-size: 0.95rem;
}

/* ============================================
   PORTFOLIO CARDS
   ============================================ */
.portfolio-card {
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  overflow: hidden;
  margin-bottom: var(--spacing-md);
  transition: none;
}

.portfolio-card img {
  width: 100%;
  height: auto;
  display: block;
}

.portfolio-card .card-body {
  padding: var(--spacing-md);
}

/* ============================================
   ACCORDION (FAQ)
   ============================================ */
.accordion {
  width: 100%;
}

.accordion-item {
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  margin-bottom: var(--spacing-sm);
  background: var(--color-bg);
}

.accordion-button {
  width: 100%;
  padding: var(--spacing-md);
  text-align: left;
  background: var(--color-bg);
  border: none;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-dark);
  cursor: pointer;
}

.accordion-button:not(.collapsed) {
  color: var(--color-accent);
}

.accordion-body {
  padding: 0 var(--spacing-md) var(--spacing-md) var(--spacing-md);
  color: var(--color-grey);
  line-height: 1.7;
}

/* ============================================
   MODALS
   ============================================ */
.modal {
  display: none;
  position: fixed;
  z-index: 2000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0,0,0,0.5);
  padding: var(--spacing-md);
  overflow: auto;
}

.modal-content {
  background-color: var(--color-bg);
  margin: 5% auto;
  padding: var(--spacing-lg);
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  max-width: 800px;
  width: 100%;
  position: relative;
}

.modal-body {
  padding: 0;
}

.modal-body img {
  width: 100%;
  height: auto;
  margin-bottom: var(--spacing-md);
  border-radius: 0.5rem;
}

.modal-close {
  position: absolute;
  right: var(--spacing-md);
  top: var(--spacing-md);
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--color-grey);
  cursor: pointer;
  border: none;
  background: none;
}

.modal-close:hover {
  color: var(--color-dark);
}

/* ============================================
   FOOTER
   ============================================ */
footer {
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg) 0;
  margin-top: var(--spacing-xl);
  text-align: center;
}

footer small {
  display: block;
  margin-bottom: var(--spacing-sm);
  color: var(--color-grey);
  font-size: 0.9rem;
}

footer a {
  display: inline-block;
  margin: 0 var(--spacing-xs);
  color: var(--color-accent);
  text-decoration: none;
  font-size: 1.2rem;
  transition: none;
}

/* ============================================
   UTILITIES
   ============================================ */
.text-center {
  text-align: center;
}

.text-accent {
  color: var(--color-accent);
}

.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-3 {
  margin-top: var(--spacing-md);
}

.mt-4 {
  margin-top: var(--spacing-lg);
}

/* Remove animations */
.js-fade {
  opacity: 1;
  transform: none;
}

.fade-in {
  opacity: 1;
  transform: none;
}

/* ============================================
   TABLET STYLES (768px+)
   ============================================ */
@media (min-width: 768px) {
  :root {
    --container-padding: var(--spacing-md);
    --container-max-width: 720px;
  }
  
  html {
    font-size: 16px;
  }
  
  body {
    padding: var(--spacing-md) var(--spacing-lg);
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  h3 {
    font-size: 1.35rem;
  }
  
  section {
    padding: var(--spacing-xxl) 0;
  }
  
  .row {
    flex-direction: row;
    flex-wrap: wrap;
  }
  
  .col-md-4 {
    width: calc(50% - var(--spacing-md) / 2);
  }
  
  .col-md-6 {
    width: calc(50% - var(--spacing-md) / 2);
  }
  
  .col-lg-3 {
    width: calc(50% - var(--spacing-md) / 2);
  }
  
  .col-lg-5 {
    width: calc(50% - var(--spacing-md) / 2);
  }
  
  .col-lg-6 {
    width: calc(50% - var(--spacing-md) / 2);
  }
  
  .btn {
    width: auto;
    display: inline-block;
  }
  
  /* Desktop Navigation */
  .mobile-nav {
    display: flex !important;
    width: auto;
    margin-top: 0;
    padding: 0;
    border-top: none;
    background: transparent;
  }
  
  .mobile-nav.open {
    display: flex !important;
    animation: none;
  }
  
  .nav-list {
    display: flex;
    flex-direction: row;
    gap: var(--spacing-md);
    width: auto;
    padding: 0;
    margin: 0;
  }
  
  .nav-item {
    border-top: none;
  }
  
  .nav-link {
    padding: var(--spacing-xs) var(--spacing-sm);
    white-space: nowrap;
  }
  
  .nav-toggle {
    display: none;
  }
}

/* ============================================
   DESKTOP STYLES (992px+)
   ============================================ */
@media (min-width: 992px) {
  :root {
    --container-max-width: 960px;
    --container-padding: var(--spacing-lg);
  }
  
  body {
    padding: var(--spacing-md) 0;
  }
  
  .container {
    max-width: 700px;
  }
  
  h1 {
    font-size: 2.2rem;
  }
  
  h2 {
    font-size: 1.8rem;
  }
  
  section {
    padding: calc(var(--spacing-xxl) + 1rem) 0;
  }
  
  .col-md-4 {
    width: calc(33.333% - var(--spacing-md) * 2 / 3);
  }
  
  .col-lg-3 {
    width: calc(25% - var(--spacing-md) * 3 / 4);
  }
  
  .col-lg-5 {
    width: calc(41.666% - var(--spacing-md) / 2);
  }
  
  .col-lg-6 {
    width: calc(50% - var(--spacing-md) / 2);
  }
  
  .col-lg-8 {
    width: calc(66.666% - var(--spacing-md) / 3);
  }
  
  #hero {
    min-height: 70vh;
    display: flex;
    align-items: center;
  }
  
  #hero .container {
    max-width: 900px;
  }
  
  .content-container {
    max-width: 650px;
  }
  
  .section-container {
    max-width: 800px;
  }
}

/* ============================================
   LARGE DESKTOP (1200px+)
   ============================================ */
@media (min-width: 1200px) {
  :root {
    --container-max-width: 1140px;
  }
}