/* ============================================================
   AJD · Automatiza, Jerarquiza, Desarrolla
   Tema: Oscuro con acentos verde jade
   ============================================================ */

:root {
    /* Fondos */
    --bg-deep: #0a1f1a;
    --bg-surface: #1C1C1C;
    --bg-card: #14241e;
    --bg-elevated: #1a2e26;

    /* Jade */
    --jade-900: #1b4332;
    --jade-800: #2d6a4f;
    --jade-700: #40916c;
    --jade-500: #52b788;
    --jade-300: #95d5b2;
    --jade-100: #d8f3dc;

    /* Texto */
    --text-primary: #fcfbf8;
    --text-secondary: #95d5b2;
    --text-muted: #6b8f7a;

    /* Bordes */
    --border-subtle: rgba(45, 106, 79, 0.35);
    --border-jade: rgba(64, 145, 108, 0.6);

    /* Sombras */
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 8px 24px rgba(0,0,0,0.4);
    --shadow-lg: 0 16px 48px rgba(0,0,0,0.5);
    --shadow-jade: 0 0 30px rgba(45, 106, 79, 0.25);

    /* Radios */
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-full: 999px;

    /* Transiciones */
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);

    /* Tipografía */
    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; }

/* ==================== UTILIDADES ==================== */
.container {
    width: min(1200px, 92%);
    margin-inline: auto;
}

.text-jade { color: var(--jade-500); }

.section {
    padding: 96px 0;
}

.section--dark {
    background: linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-surface) 100%);
}

.section__header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 64px;
}

.section__tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(45, 106, 79, 0.2);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--jade-300);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-bottom: 20px;
}

.section__title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 16px;
}

.section__subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

/* ==================== BOTONES ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
    white-space: nowrap;
}

.btn--primary {
    background: var(--jade-800);
    color: var(--text-primary);
    box-shadow: var(--shadow-jade);
}
.btn--primary:hover {
    background: var(--jade-700);
    transform: translateY(-2px);
    box-shadow: 0 0 40px rgba(45, 106, 79, 0.4);
}

.btn--jade {
    background: linear-gradient(135deg, var(--jade-800), var(--jade-700));
    color: var(--text-primary);
}
.btn--jade:hover {
    background: linear-gradient(135deg, var(--jade-700), var(--jade-500));
    transform: translateY(-2px);
}

.btn--ghost {
    background: transparent;
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
}
.btn--ghost:hover {
    border-color: var(--jade-500);
    color: var(--jade-300);
}

.btn--admin {
    width: 42px;
    height: 42px;
    padding: 0;
    border-radius: 50%;
    background: rgba(45, 106, 79, 0.15);
    border: 1px solid var(--border-subtle);
    color: var(--jade-300);
    justify-content: center;
    font-size: 1rem;
}
.btn--admin:hover {
    background: var(--jade-800);
    color: white;
}

.btn--full { width: 100%; justify-content: center; }

/* ==================== HEADER ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 31, 26, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
}

.logo__icon {
    display: grid;
    place-items: center;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--jade-800), var(--jade-500));
    border-radius: 12px;
    font-size: 1.1rem;
    color: white;
}

.logo__dot { color: var(--jade-500); }

.nav {
    display: flex;
    gap: 32px;
}

.nav__link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
    position: relative;
}
.nav__link:hover { color: var(--jade-300); }
.nav__link::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--jade-500);
    transition: var(--transition);
}
.nav__link:hover::after { width: 100%; }

.header__actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}
.hamburger span {
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ==================== CARRUSEL ==================== */
.hero {
    margin-top: 72px;
    position: relative;
}

.carousel {
    position: relative;
    overflow: hidden;
    height: min(70vh, 600px);
}

.carousel__track {
    display: flex;
    height: 100%;
    transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.carousel__slide {
    min-width: 100%;
    height: 100%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding: 0 8%;
}

.carousel__slide-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    filter: brightness(1) saturate(3);
}

.carousel__slide-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(10deg, var(--bg-deep) 0%, rgba(10,31,26,0.7) 60%, transparent 100%);
}

.carousel__content {
    position: relative;
    z-index: 2;
    max-width: 600px;
}

.carousel__tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: rgba(45, 106, 79, 0.3);
    border: 1px solid var(--border-jade);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--jade-300);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 20px;
}

.carousel__title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 16px;
}

.carousel__text {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 28px;
    max-width: 480px;
}

.carousel__btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(20, 36, 30, 0.8);
    border: 1px solid var(--border-subtle);
    color: var(--jade-300);
    display: grid;
    place-items: center;
    font-size: 1rem;
    transition: var(--transition);
    backdrop-filter: blur(8px);
}
.carousel__btn:hover {
    background: var(--jade-800);
    color: white;
    border-color: var(--jade-500);
}
.carousel__btn--prev { left: 20px; }
.carousel__btn--next { right: 20px; }

.carousel__dots {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    gap: 10px;
}

.carousel__dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
    transition: var(--transition);
    cursor: pointer;
    border: none;
}
.carousel__dot.active {
    background: var(--jade-500);
    width: 28px;
    border-radius: var(--radius-full);
}

/* ==================== ESTADÍSTICAS ==================== */
.stats {
    padding: 48px 0;
    border-bottom: 1px solid var(--border-subtle);
}

.stats__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    text-align: center;
}

.stat__number {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    font-weight: 700;
    color: var(--jade-500);
}

.stat__label {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ==================== TARJETAS DE CURSO ==================== */
.courses__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 28px;
}

.course-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}
.course-card:hover {
    transform: translateY(-6px);
    border-color: var(--jade-700);
    box-shadow: var(--shadow-jade);
}

.course-card__img {
    height: 180px;
    background: linear-gradient(135deg, var(--jade-900), var(--jade-800));
    position: relative;
    overflow: hidden;
}
.course-card__img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}
.course-card:hover .course-card__img img {
    transform: scale(1.05);
}

.course-card__badge {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 4px 12px;
    background: rgba(10, 31, 26, 0.8);
    backdrop-filter: blur(8px);
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--jade-300);
    border: 1px solid var(--border-subtle);
}

.course-card__body {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.course-card__category {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--jade-500);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.course-card__title {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 10px;
}

.course-card__desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    flex: 1;
}

.course-card__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    padding-top: 16px;
    border-top: 1px solid var(--border-subtle);
    font-size: 0.78rem;
    color: var(--text-muted);
}

.course-card__meta span {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.course-card__footer {
    padding: 0 24px 24px;
}

/* ==================== VALIDACIÓN CERTIFICADOS ==================== */
.verify {
    max-width: 680px;
    margin: 0 auto;
}

.verify__form {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-md);
}

.verify__input-group {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--bg-deep);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 6px 6px 6px 18px;
    transition: var(--transition);
}
.verify__input-group:focus-within {
    border-color: var(--jade-500);
    box-shadow: 0 0 0 3px rgba(64, 145, 108, 0.15);
}

.verify__input-group > i {
    color: var(--jade-500);
    font-size: 1rem;
}

.verify__input {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 1rem;
    padding: 12px 0;
    letter-spacing: 1px;
}
.verify__input::placeholder {
    color: var(--text-muted);
    letter-spacing: 0;
}

.verify__result {
    margin-top: 20px;
    border-radius: var(--radius-md);
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    transition: all 0.5s ease;
}
.verify__result.show {
    max-height: 400px;
    opacity: 1;
    padding: 20px;
    border: 1px solid var(--border-subtle);
}

.verify__result.valid {
    background: rgba(45, 106, 79, 0.15);
    border-color: var(--jade-700) !important;
}

.verify__result.invalid {
    background: rgba(220, 53, 69, 0.1);
    border-color: rgba(220, 53, 69, 0.4) !important;
}

.verify__result-icon {
    font-size: 2rem;
    margin-bottom: 10px;
}
.valid .verify__result-icon { color: var(--jade-500); }
.invalid .verify__result-icon { color: #f87171; }

.verify__result-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.verify__result-detail {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ==================== GOOGLE FORM ==================== */
.google-form-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.google-form-wrapper iframe {
    display: block;
    width: 100%;
    min-height: 600px;
    border: none;
    filter: invert(0.92) hue-rotate(120deg) saturate(0.8);
}

/* ==================== FOOTER ==================== */
.footer {
    padding: 48px 0 32px;
    border-top: 1px solid var(--border-subtle);
    background: var(--bg-surface);
}

.footer__inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    text-align: center;
}

.footer__brand .logo__text {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
}

.footer__brand p {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 6px;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.footer__links {
    display: flex;
    gap: 28px;
}

.footer__links a {
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: var(--transition);
}
.footer__links a:hover { color: var(--jade-300); }

.footer__copy {
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* ==================== MODAL ADMIN ==================== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.modal.open { display: flex; }

.modal__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(4px);
}

.modal__content {
    position: relative;
    z-index: 2;
    width: min(720px, 100%);
    max-height: 90vh;
    overflow-y: auto;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from { opacity: 0; transform: translateY(20px) scale(0.97); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 28px;
    border-bottom: 1px solid var(--border-subtle);
}

.modal__header h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}
.modal__header h3 i { color: var(--jade-500); }

.modal__close {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    color: var(--text-muted);
    transition: var(--transition);
}
.modal__close:hover {
    background: rgba(220, 53, 69, 0.15);
    color: #f87171;
}

.modal__body { padding: 28px; }

/* Admin */
.admin__hint {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.admin__error {
    color: #f87171;
    font-size: 0.85rem;
    margin-top: 12px;
    min-height: 20px;
}

.admin__toolbar {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.admin__form {
    background: var(--bg-deep);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 24px;
    margin-bottom: 24px;
}

.admin__form h4 {
    font-family: var(--font-display);
    margin-bottom: 20px;
    color: var(--jade-300);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-input {
    width: 100%;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    color: var(--text-primary);
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition);
}
.form-input:focus {
    border-color: var(--jade-500);
    box-shadow: 0 0 0 3px rgba(64, 145, 108, 0.15);
}
.form-input::placeholder { color: var(--text-muted); }

textarea.form-input { resize: vertical; }

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 8px;
}

/* Lista admin */
.admin__list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.admin__item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px 20px;
    background: var(--bg-deep);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    transition: var(--transition);
}
.admin__item:hover {
    border-color: var(--jade-700);
}

.admin__item-info {
    flex: 1;
    min-width: 0;
}

.admin__item-title {
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.admin__item-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.admin__item-actions {
    display: flex;
    gap: 8px;
}

.admin__item-actions button {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    display: grid;
    place-items: center;
    font-size: 0.85rem;
    transition: var(--transition);
    border: 1px solid var(--border-subtle);
}

.btn-edit {
    color: var(--jade-500);
    background: rgba(45, 106, 79, 0.1);
}
.btn-edit:hover {
    background: var(--jade-800);
    color: white;
}

.btn-delete {
    color: #f87171;
    background: rgba(220, 53, 69, 0.1);
}
.btn-delete:hover {
    background: rgba(220, 53, 69, 0.8);
    color: white;
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 900px) {
    .nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(10, 31, 26, 0.98);
        backdrop-filter: blur(20px);
        padding: 24px;
        gap: 20px;
        border-bottom: 1px solid var(--border-subtle);
        transform: translateY(-120%);
        transition: var(--transition);
        z-index: 99;
    }
    .nav.open { transform: translateY(0); }
    .hamburger { display: flex; }

    .stats__grid { grid-template-columns: 1fr; gap: 24px; }

    .form-row { grid-template-columns: 1fr; }

    .carousel__btn { width: 40px; height: 40px; }
    .carousel__btn--prev { left: 12px; }
    .carousel__btn--next { right: 12px; }

    .carousel__slide { padding: 0 6%; }
}

@media (max-width: 600px) {
    .section { padding: 64px 0; }
    .header__actions .btn--primary span { display: none; }
    .courses__grid { grid-template-columns: 1fr; }
    .verify__form { padding: 24px; }
    .verify__input-group {
        flex-direction: column;
        align-items: stretch;
        padding: 16px;
        gap: 12px;
    }
    .verify__input-group > i { display: none; }
    .verify__input { text-align: center; }
    .google-form-wrapper iframe { min-height: 700px; }
}
/* ============================================================
   SUBIDA DE IMÁGENES DE CURSOS
   ============================================================ */

.image-upload-box {
    width: 100%;
    margin-top: 6px;
}

.image-upload-input {
    display: none;
}

.image-upload-label {
    min-height: 120px;
    width: 100%;
    border: 2px dashed var(--jade-400);
    border-radius: 14px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 7px;
    cursor: pointer;
    background: rgba(255,255,255,.025);
    transition: all .25s ease;
    text-align: center;
    padding: 20px;
}

.image-upload-label:hover {
    border-color: var(--jade-300);
    background: rgba(255,255,255,.05);
    transform: translateY(-1px);
}

.image-upload-label i {
    font-size: 30px;
    color: var(--jade-300);
}

.image-upload-label span {
    font-size: 14px;
    font-weight: 700;
    color: #fff;
}

.image-upload-label small {
    font-size: 11px;
    color: rgba(255,255,255,.55);
}

.image-upload-preview {
    margin-top: 12px;
    min-height: 80px;
    border-radius: 12px;
    overflow: hidden;
    background: rgba(0,0,0,.18);
    border: 1px solid rgba(255,255,255,.08);
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-upload-preview img {
    display: block;
    width: 100%;
    max-height: 220px;
    object-fit: cover;
}

.image-upload-preview span {
    color: rgba(255,255,255,.45);
    font-size: 13px;
    padding: 20px;
    text-align: center;
}

.image-upload-preview span i {
    margin-right: 6px;
}

.image-upload-status {
    margin: 8px 0 0;
    font-size: 12px;
    color: var(--jade-300);
}

.image-upload-status.error {
    color: #ff7b7b;
}

.image-upload-status.success {
    color: #70e0a0;
}

/* Estado de carga del botón guardar */
#saveCourseBtn.is-loading {
    opacity: .65;
    pointer-events: none;
}

#saveCourseBtn.is-loading i {
    animation: ajdSpin 1s linear infinite;
}

@keyframes ajdSpin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}