/* ============================================================
   VERSUS PARTNER — main.css
   Sistema de diseño base: variables, tipografía, reset, BEM
   ============================================================ */

/* ── Tipografías locales ── */
@font-face {
  font-family: 'TTCommons';
  src: url('../fonts/TT_Commons_Pro_Trial_Regular.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'TTCommons';
  src: url('../fonts/TT_Commons_Pro_Trial_DemiBold.ttf') format('truetype');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'TTCommons';
  src: url('../fonts/TT_Commons_Pro_Trial_Bold.ttf') format('truetype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* ── Variables CSS ── */
:root {
  /* Paleta */
  --color-bg:          #0d0d0d;
  --color-surface:     #161616;
  --color-surface-alt: #1e1e1e;
  --color-border:      #2a2a2a;
  --color-border-alt:  #333333;

  --color-text:        #f0f0f0;
  --color-text-muted:  #8a8a8a;
  --color-text-dark:   #0d0d0d;

  --color-accent:      #DDFF00;
  --color-accent-hover:#cceb00;
  --color-accent-dark: #b8d400;
  --color-aquamarine:  #09FFD8;

  --color-error:       #e05c5c;
  --color-success:     #4caf7d;

  /* Tipografía */
  --font-base: 'TTCommons', Arial, sans-serif;
  --fs-xs:   0.75rem;
  --fs-sm:   0.875rem;
  --fs-base: 1rem;
  --fs-md:   1.125rem;
  --fs-lg:   1.375rem;
  --fs-xl:   1.75rem;
  --fs-2xl:  2.25rem;
  --fs-3xl:  3rem;

  /* Espaciados */
  --space-xs:  4px;
  --space-sm:  8px;
  --space-md:  16px;
  --space-lg:  24px;
  --space-xl:  40px;
  --space-2xl: 64px;

  /* Radios (Paso 15: Rectangulares) */
  --radius-sm: 0px;
  --radius-md: 0px;
  --radius-lg: 0px;
  --radius-full: 9999px;

  /* Sombras */
  --shadow-card: 0 4px 24px rgba(0,0,0,0.5);
  --shadow-accent: 0 0 20px rgba(245,200,0,0.15);

  /* Transiciones */
  --transition: 0.2s ease;
  --transition-slow: 0.4s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-base);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

h1 {
  color: var(--color-aquamarine);
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

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

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

ul, ol {
  list-style: none;
}

button {
  font-family: var(--font-base);
  cursor: pointer;
  border: none;
  background: none;
}

input, select, textarea {
  font-family: var(--font-base);
}

/* ── Componente: btn ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 14px var(--space-xl);
  border-radius: var(--radius-sm);
  font-size: var(--fs-base);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: background-color var(--transition), transform var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-text-dark);
}

.btn--primary:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-accent);
  color: var(--color-text-dark);
}

.btn--primary:active {
  transform: translateY(0);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
}

.btn--outline:hover {
  background-color: var(--color-accent);
  color: var(--color-text-dark);
}

.btn--full {
  width: 100%;
}

/* ── Componente: input ── */
.form__group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form__label {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-aquamarine);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.form__input,
.form__select {
  width: 100%;
  padding: 14px var(--space-md);
  background-color: var(--color-surface-alt);
  border: 1.5px solid var(--color-border-alt);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: var(--fs-base);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}

.form__select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%238a8a8a' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 42px;
}

.form__input:focus,
.form__select:focus {
  border-color: var(--color-aquamarine);
  box-shadow: 0 0 0 3px rgba(9, 255, 216, 0.12);
}

.form__input::placeholder {
  color: var(--color-text-muted);
}

/* ── Componente: checkbox ── */
.form__checkbox-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.form__checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  line-height: 1.5;
}

.form__checkbox {
  width: 20px;
  height: 20px;
  min-width: 20px;
  accent-color: var(--color-accent);
  cursor: pointer;
  margin-top: 2px;
}

/* ── Componente: mensaje de alerta ── */
.alerta {
  padding: var(--space-md);
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  font-weight: 600;
  display: none;
}

.alerta--error {
  background-color: rgba(224,92,92,0.12);
  border: 1px solid var(--color-error);
  color: var(--color-error);
}

.alerta--exito {
  background-color: rgba(9, 255, 216, 0.08);
  border: 1px solid var(--color-aquamarine);
  color: var(--color-aquamarine);
}

.alerta--visible {
  display: block;
}

/* ── Componente: spinner ── */
.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(13,13,13,0.3);
  border-top-color: var(--color-text-dark);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: none;
}

.spinner--visible {
  display: block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ── Utilidades ── */
.u-text-center { text-align: center; }
.u-mt-sm  { margin-top: var(--space-sm); }
.u-mt-md  { margin-top: var(--space-md); }
.u-mt-lg  { margin-top: var(--space-lg); }
.u-mt-xl  { margin-top: var(--space-xl); }
.u-hidden { display: none !important; }

/* ── Responsive base ── */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-lg);
  }
}

/* ── Estilos de Logo (Paso 16) ── */
.login-card__logo-img,
.registro-card__logo-img {
  max-width: 180px;
  max-height: 60px;
  object-fit: contain;
  margin: 0 auto 15px;
  display: block;
}

.nav__logo-img {
  height: 35px;
  width: auto;
  display: block;
  object-fit: contain;
}

/* ── Componente: Modal (Paso 17) ── */
.modal {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background-color: rgba(0, 0, 0, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  backdrop-filter: blur(4px);
}

.modal--open {
  opacity: 1;
  visibility: visible;
}

.modal__box {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-xl);
  max-width: 440px;
  width: 90%;
  text-align: center;
  transform: translateY(20px);
  transition: transform 0.3s ease;
}

.modal--open .modal__box {
  transform: translateY(0);
}

.modal__title {
  color: var(--color-aquamarine);
  font-size: var(--fs-lg);
  margin-bottom: var(--space-md);
  text-transform: uppercase;
}

.modal__text {
  margin-bottom: var(--space-xl);
  color: var(--color-text-muted);
}

.modal__actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
}

/* ── Componente: Home Slider (Paso 32) ── */
.home-slider {
  position: relative;
  width: 100%;
  overflow: hidden;
  background-color: var(--color-surface);
  /* Garantizar altura por proporción (Hack del padding) */
  height: 0;
  padding-bottom: 66.66%; /* 3:2 Ratio para Mobile */
}

@media (min-width: 768px) {
  .home-slider {
    padding-bottom: 31.25%; /* 16:5 Ratio para Desktop */
  }
}

.home-slider__track {
  position: absolute;
  top: 0;
  left: 0;
  display: flex;
  width: 100%;
  height: 100%;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.home-slider__slide {
  min-width: 100%;
  height: 100%;
  position: relative;
  flex-shrink: 0;
}

.home-slider__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.home-slider__img--mobile {
  display: none;
}

@media (max-width: 767px) {
  .home-slider__img--desktop {
    display: none;
  }
  .home-slider__img--mobile {
    display: block;
  }
}

.home-slider__nav {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 10;
}

.home-slider__dot {
  width: 10px;
  height: 10px;
  background-color: rgba(255, 255, 255, 0.25);
  border-radius: 50%;
  border: none;
  cursor: pointer;
  padding: 0;
  transition: all 0.3s ease;
}

.home-slider__dot--active {
  background-color: var(--color-aquamarine);
  transform: scale(1.3);
  box-shadow: 0 0 10px rgba(9, 255, 216, 0.4);
}

.home-slider__dot:hover:not(.home-slider__dot--active) {
  background-color: rgba(9, 255, 216, 0.3);
}