/*
Theme Name: Sommerschule
Theme URI: https://example.com
Author: Stefan Stockinger
Author URI: https://example.com
Description: WordPress-Theme für die Sommerschule – Kurse in Bildbearbeitung, Lightroom, Fotografie, Bootstrap-Entwicklung, C#-Coding und Blender.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 8.0
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: sommerschule
Tags: education, responsive, custom-colors, full-site-editing, one-page
*/

/* =============================================
   CSS Custom Properties
   ============================================= */
:root {
    --color-primary:       #1a56db;
    --color-primary-dark:  #1e40af;
    --color-primary-light: #dbeafe;
    --color-secondary:     #f59e0b;
    --color-secondary-dark:#d97706;
    --color-accent:        #10b981;

    --color-text:          #1e293b;
    --color-text-muted:    #64748b;
    --color-bg:            #ffffff;
    --color-bg-alt:        #f8fafc;
    --color-bg-dark:       #0f172a;
    --color-border:        #e2e8f0;

    --course-1: #db2777; /* Bildbearbeitung – pink    */
    --course-2: #ea580c; /* Lightroom      – orange   */
    --course-3: #0891b2; /* Fotografie     – cyan     */
    --course-4: #7c3aed; /* Bootstrap      – violet   */
    --course-5: #1d4ed8; /* C#             – blue     */
    --course-6: #d97706; /* Blender        – amber    */

    --font-sans:    'Inter', system-ui, -apple-system, sans-serif;
    --font-display: 'Poppins', 'Inter', system-ui, sans-serif;

    --radius-sm:  0.375rem;
    --radius-md:  0.625rem;
    --radius-lg:  1rem;
    --radius-xl:  1.5rem;

    --shadow-sm:  0 1px 2px 0 rgb(0 0 0 / .05);
    --shadow-md:  0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);
    --shadow-lg:  0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);
    --shadow-xl:  0 20px 25px -5px rgb(0 0 0 / .1), 0 8px 10px -6px rgb(0 0 0 / .1);

    --transition: 0.2s ease;
    --container:  72rem;
}

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

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

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

img, video { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-dark); }

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    line-height: 1.2;
    font-weight: 700;
    color: var(--color-text);
}

ul { list-style: none; }

/* =============================================
   Layout helpers
   ============================================= */
.container {
    width: 100%;
    max-width: var(--container);
    margin-inline: auto;
    padding-inline: 1.25rem;
}

.section {
    padding-block: 5rem;
}

.section--alt {
    background: var(--color-bg-alt);
}

.section__header {
    text-align: center;
    margin-bottom: 3rem;
}

.section__eyebrow {
    display: inline-block;
    font-size: .75rem;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--color-primary);
    background: var(--color-primary-light);
    padding: .25rem .75rem;
    border-radius: 999px;
    margin-bottom: .75rem;
}

.section__title {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    margin-bottom: 1rem;
}

.section__subtitle {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 40rem;
    margin-inline: auto;
}

/* =============================================
   Buttons
   ============================================= */
.btn {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: .9375rem;
    padding: .75rem 1.75rem;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: background var(--transition), color var(--transition),
                border-color var(--transition), box-shadow var(--transition),
                transform var(--transition);
    text-decoration: none;
    line-height: 1;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}
.btn--primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: #fff;
    box-shadow: 0 4px 14px rgb(26 86 219 / .4);
}

.btn--outline {
    background: transparent;
    color: #fff;
    border-color: rgba(255,255,255,.6);
}
.btn--outline:hover {
    background: rgba(255,255,255,.15);
    border-color: #fff;
    color: #fff;
}

.btn--secondary {
    background: var(--color-secondary);
    color: #fff;
    border-color: var(--color-secondary);
}
.btn--secondary:hover {
    background: var(--color-secondary-dark);
    border-color: var(--color-secondary-dark);
    color: #fff;
}

.btn--lg { padding: 1rem 2.25rem; font-size: 1.0625rem; }

/* =============================================
   Site Header / Navigation
   ============================================= */
.site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 100;
    background: rgba(15, 23, 42, .92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255,255,255,.08);
    transition: box-shadow var(--transition);
}

.site-header.scrolled {
    box-shadow: 0 2px 20px rgb(0 0 0 / .3);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4rem;
}

.nav__brand {
    display: flex;
    align-items: center;
    gap: .625rem;
    color: #fff;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.125rem;
    text-decoration: none;
}
.nav__brand:hover { color: var(--color-secondary); }

.nav__logo-icon {
    width: 2rem;
    height: 2rem;
    background: var(--color-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: .25rem;
}

.nav__link {
    color: rgba(255,255,255,.75);
    font-size: .9375rem;
    font-weight: 500;
    padding: .5rem .875rem;
    border-radius: var(--radius-sm);
    transition: color var(--transition), background var(--transition);
    text-decoration: none;
}
.nav__link:hover {
    color: #fff;
    background: rgba(255,255,255,.1);
}

.nav__cta {
    margin-left: .5rem;
    background: var(--color-secondary);
    color: #fff;
    font-weight: 600;
    font-size: .875rem;
    padding: .5rem 1.125rem;
    border-radius: var(--radius-sm);
    transition: background var(--transition);
    text-decoration: none;
}
.nav__cta:hover { background: var(--color-secondary-dark); color: #fff; }

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: .5rem;
}
.nav__toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: transform var(--transition), opacity var(--transition);
}

/* =============================================
   Hero Section
   ============================================= */
.hero {
    position: relative;
    min-height: 100svh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--color-bg-dark);
}

.hero__bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(26, 86, 219, .25) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(245, 158, 11, .15) 0%, transparent 50%),
        radial-gradient(ellipse at 60% 80%, rgba(16, 185, 129, .1) 0%, transparent 50%),
        linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

.hero__grid-lines {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.hero__content {
    position: relative;
    z-index: 2;
    max-width: 52rem;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    background: rgba(245, 158, 11, .15);
    border: 1px solid rgba(245, 158, 11, .3);
    color: var(--color-secondary);
    font-size: .8125rem;
    font-weight: 600;
    letter-spacing: .06em;
    text-transform: uppercase;
    padding: .375rem 1rem;
    border-radius: 999px;
    margin-bottom: 1.5rem;
}

.hero__badge::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--color-secondary);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

.hero__title {
    font-size: clamp(2.5rem, 7vw, 5rem);
    color: #fff;
    line-height: 1.05;
    margin-bottom: 1.5rem;
    letter-spacing: -.02em;
}

.hero__title em {
    font-style: normal;
    background: linear-gradient(135deg, var(--color-secondary), #fbbf24);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: rgba(255,255,255,.7);
    max-width: 38rem;
    margin-bottom: 2.5rem;
    line-height: 1.7;
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 3.5rem;
}

.hero__stats {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
}

.hero__stat {
    display: flex;
    flex-direction: column;
}

.hero__stat-value {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    color: #fff;
    line-height: 1;
}

.hero__stat-label {
    font-size: .8125rem;
    color: rgba(255,255,255,.5);
    margin-top: .25rem;
}

.hero__scroll {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .5rem;
    color: rgba(255,255,255,.4);
    font-size: .75rem;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.hero__scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, rgba(255,255,255,.4), transparent);
    animation: scrollLine 2s ease-in-out infinite;
}

/* =============================================
   Courses Section
   ============================================= */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 20rem), 1fr));
    gap: 1.5rem;
}

.course-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
    position: relative;
    overflow: hidden;
}

.course-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--course-color, var(--color-primary));
}

.course-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
    border-color: transparent;
}

.course-card__icon {
    width: 3.25rem;
    height: 3.25rem;
    border-radius: var(--radius-lg);
    background: color-mix(in srgb, var(--course-color, var(--color-primary)) 12%, white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.course-card__tag {
    display: inline-block;
    font-size: .6875rem;
    font-weight: 700;
    letter-spacing: .07em;
    text-transform: uppercase;
    color: var(--course-color, var(--color-primary));
    background: color-mix(in srgb, var(--course-color, var(--color-primary)) 10%, white);
    padding: .2rem .625rem;
    border-radius: 999px;
    width: fit-content;
}

.course-card__title {
    font-size: 1.25rem;
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.3;
}

.course-card__description {
    font-size: .9375rem;
    color: var(--color-text-muted);
    line-height: 1.65;
    flex-grow: 1;
}

.course-card__meta {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
    margin-top: auto;
}

.course-card__pill {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    font-size: .8125rem;
    color: var(--color-text-muted);
    background: var(--color-bg-alt);
    padding: .25rem .625rem;
    border-radius: 999px;
}

/* =============================================
   Info / Zeitraum Section
   ============================================= */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
    gap: 1.5rem;
}

.info-card {
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    padding: 2rem 1.5rem;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition), box-shadow var(--transition);
}
.info-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.info-card__icon {
    font-size: 2.25rem;
    margin-bottom: 1rem;
    display: block;
}

.info-card__title {
    font-family: var(--font-display);
    font-size: 1.0625rem;
    font-weight: 700;
    margin-bottom: .5rem;
    color: var(--color-text);
}

.info-card__text {
    font-size: .9375rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* =============================================
   Registration Form Section
   ============================================= */
.form-section {
    background: var(--color-bg-dark);
    position: relative;
    overflow: hidden;
}

.form-section__bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 0% 0%, rgba(26, 86, 219, .2) 0%, transparent 50%),
        radial-gradient(ellipse at 100% 100%, rgba(245, 158, 11, .1) 0%, transparent 50%);
}

.form-section .section__eyebrow {
    background: rgba(245, 158, 11, .15);
    color: var(--color-secondary);
    border: 1px solid rgba(245, 158, 11, .25);
}

.form-section .section__title { color: #fff; }
.form-section .section__subtitle { color: rgba(255,255,255,.65); }

.form-wrapper {
    position: relative;
    z-index: 2;
    max-width: 48rem;
    margin-inline: auto;
}

.registration-form {
    background: rgba(255,255,255,.05);
    border: 1px solid rgba(255,255,255,.1);
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    backdrop-filter: blur(8px);
}

.form-row {
    display: grid;
    gap: 1rem;
}

.form-row--2 { grid-template-columns: 1fr 1fr; }
.form-row + .form-row { margin-top: 1rem; }

.form-group {
    display: flex;
    flex-direction: column;
    gap: .4rem;
}

.form-label {
    font-size: .875rem;
    font-weight: 600;
    color: rgba(255,255,255,.85);
}

.form-label .required {
    color: #f87171;
    margin-left: .25rem;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    background: rgba(255,255,255,.07);
    border: 1px solid rgba(255,255,255,.15);
    border-radius: var(--radius-md);
    color: #fff;
    font-family: var(--font-sans);
    font-size: .9375rem;
    padding: .75rem 1rem;
    transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
    outline: none;
    -webkit-appearance: none;
}

.form-input::placeholder,
.form-textarea::placeholder { color: rgba(255,255,255,.3); }

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--color-primary);
    background: rgba(255,255,255,.1);
    box-shadow: 0 0 0 3px rgba(26, 86, 219, .25);
}

.form-select {
    cursor: pointer;
    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='rgba(255,255,255,0.5)' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right .75rem center;
    background-color: rgba(255,255,255,.07);
    padding-right: 2.5rem;
}

.form-select option { background: #1e293b; color: #fff; }

.form-textarea { resize: vertical; min-height: 7rem; }

/* Course checkboxes */
.courses-label {
    font-size: .875rem;
    font-weight: 600;
    color: rgba(255,255,255,.85);
    margin-bottom: .75rem;
    display: block;
}

.courses-label .required { color: #f87171; margin-left: .25rem; }

.course-checkboxes {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: .625rem;
}

.course-checkbox {
    display: flex;
    align-items: center;
    gap: .75rem;
    background: rgba(255,255,255,.05);
    border: 1px solid rgba(255,255,255,.1);
    border-radius: var(--radius-md);
    padding: .75rem 1rem;
    cursor: pointer;
    transition: background var(--transition), border-color var(--transition);
    user-select: none;
}

.course-checkbox:has(input:checked) {
    background: rgba(26, 86, 219, .2);
    border-color: var(--color-primary);
}

.course-checkbox:hover {
    background: rgba(255,255,255,.1);
    border-color: rgba(255,255,255,.25);
}

.course-checkbox input[type="checkbox"] {
    width: 1.125rem;
    height: 1.125rem;
    accent-color: var(--color-primary);
    cursor: pointer;
    flex-shrink: 0;
}

.course-checkbox__label {
    display: flex;
    flex-direction: column;
    gap: .125rem;
}

.course-checkbox__name {
    font-size: .875rem;
    font-weight: 600;
    color: rgba(255,255,255,.9);
}

.course-checkbox__icon {
    font-size: 1.125rem;
    flex-shrink: 0;
}

/* Consent */
.form-consent {
    display: flex;
    align-items: flex-start;
    gap: .75rem;
    font-size: .875rem;
    color: rgba(255,255,255,.65);
    line-height: 1.5;
    margin-top: 1.25rem;
}

.form-consent input[type="checkbox"] {
    width: 1.125rem;
    height: 1.125rem;
    accent-color: var(--color-primary);
    margin-top: .125rem;
    flex-shrink: 0;
}

.form-consent a { color: var(--color-secondary); }
.form-consent a:hover { text-decoration: underline; }

.form-submit {
    margin-top: 1.5rem;
    text-align: center;
}

.form-submit .btn {
    width: 100%;
    justify-content: center;
    font-size: 1.0625rem;
    padding: .9375rem;
}

/* Notices */
.notice {
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    font-size: .9375rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: .75rem;
}

.notice--success {
    background: rgba(16, 185, 129, .15);
    border: 1px solid rgba(16, 185, 129, .3);
    color: #6ee7b7;
}

.notice--error {
    background: rgba(248, 113, 113, .15);
    border: 1px solid rgba(248, 113, 113, .3);
    color: #fca5a5;
}

/* =============================================
   Footer
   ============================================= */
.site-footer {
    background: #060d1a;
    color: rgba(255,255,255,.55);
    padding-block: 3rem 2rem;
    border-top: 1px solid rgba(255,255,255,.06);
}

.footer__inner {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 2rem;
    align-items: center;
}

.footer__brand {
    display: flex;
    align-items: center;
    gap: .5rem;
    color: #fff;
    font-family: var(--font-display);
    font-weight: 700;
    margin-bottom: .5rem;
}

.footer__tagline { font-size: .875rem; }

.footer__links {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
}

.footer__link {
    color: rgba(255,255,255,.5);
    font-size: .875rem;
    transition: color var(--transition);
}
.footer__link:hover { color: #fff; }

.footer__copy {
    grid-column: 1 / -1;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255,255,255,.06);
    font-size: .8125rem;
    text-align: center;
}

/* =============================================
   WordPress core classes
   ============================================= */
.wp-caption { max-width: 100%; }
.wp-caption-text { font-size: .875rem; color: var(--color-text-muted); text-align: center; }
.alignleft { float: left; margin: 0 1.5rem 1rem 0; }
.alignright { float: right; margin: 0 0 1rem 1.5rem; }
.aligncenter { display: block; margin-inline: auto; }
.alignwide { width: calc(100% + 4rem); margin-inline: -2rem; }
.screen-reader-text {
    position: absolute;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}

/* =============================================
   Animations
   ============================================= */
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50%       { opacity: .6; transform: scale(.85); }
}

@keyframes scrollLine {
    0%   { opacity: 0; transform: scaleY(0); transform-origin: top; }
    50%  { opacity: 1; }
    100% { opacity: 0; transform: scaleY(1); transform-origin: top; }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
}

.animate-in {
    animation: fadeInUp .6s ease both;
}
.animate-in:nth-child(2) { animation-delay: .1s; }
.animate-in:nth-child(3) { animation-delay: .2s; }
.animate-in:nth-child(4) { animation-delay: .3s; }
.animate-in:nth-child(5) { animation-delay: .4s; }
.animate-in:nth-child(6) { animation-delay: .5s; }

/* =============================================
   Responsive
   ============================================= */
@media (max-width: 768px) {
    .nav__menu { display: none; }
    .nav__toggle { display: flex; }

    .nav__menu.is-open {
        display: flex;
        flex-direction: column;
        position: fixed;
        inset: 4rem 0 0;
        background: rgba(15, 23, 42, .98);
        padding: 1.5rem 1.25rem;
        gap: .25rem;
        overflow-y: auto;
    }

    .nav__link { font-size: 1.0625rem; padding: .875rem 1rem; }
    .nav__cta { margin: .5rem 0 0; padding: .875rem 1rem; text-align: center; }

    .hero__stats { gap: 1.5rem; }
    .form-row--2 { grid-template-columns: 1fr; }
    .course-checkboxes { grid-template-columns: 1fr; }
    .footer__inner { grid-template-columns: 1fr; }
    .footer__links { justify-content: center; }

    .registration-form { padding: 1.5rem; }
    .section { padding-block: 3.5rem; }
}

@media (max-width: 480px) {
    .hero__title { font-size: 2.25rem; }
    .hero__actions { flex-direction: column; }
    .hero__actions .btn { justify-content: center; }
}