/* ============================================
   Teilnahmebestätigung • KI POWERBOOST Academy
   Dark Theme im Niklas Volland Branding
   ============================================ */

:root {
    --bg: #0A0A0A;
    --bg-elevated: #141414;
    --bg-card: #161616;
    --bg-card-hover: #1C1C1C;
    --border: rgba(255,255,255,0.08);
    --border-strong: rgba(255,255,255,0.15);
    --border-focus: rgba(230,0,0,0.5);
    --text: #FFFFFF;
    --text-muted: rgba(255,255,255,0.6);
    --text-dim: rgba(255,255,255,0.4);
    --accent: #E60000;
    --accent-hover: #FF1A1A;
    --accent-glow: rgba(230,0,0,0.3);
    --gold: #FEB402;
    --success: #2DD4BF;
    --error: #EF4444;
    --radius: 12px;
    --radius-lg: 20px;
    --transition: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --mono: 'DM Mono', 'JetBrains Mono', ui-monospace, SFMono-Regular, monospace;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* ===== ACCESS GATE ===== */
body.locked {
    overflow: hidden;
}

body.locked .container,
body.locked .site-header,
body.locked .site-footer {
    filter: blur(14px) saturate(0.7);
    pointer-events: none;
    user-select: none;
    transition: filter 400ms ease-out;
}

.access-gate {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background: rgba(10, 10, 10, 0.55);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    opacity: 1;
    transition: opacity 350ms ease-out;
}

.access-gate.hide {
    opacity: 0;
    pointer-events: none;
}

.access-card {
    width: 100%;
    max-width: 440px;
    padding: 2.5rem 2.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow:
        0 30px 80px rgba(0, 0, 0, 0.6),
        0 0 0 1px rgba(255, 255, 255, 0.04);
    animation: gate-pop 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes gate-pop {
    from { opacity: 0; transform: translateY(20px) scale(0.96); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.access-logo {
    margin-bottom: 1.5rem;
}

.access-card h2 {
    font-size: 1.6rem;
    font-weight: 700;
    margin: 0 0 0.5rem;
    letter-spacing: -0.02em;
}

.access-subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin: 0 0 1.75rem;
}

/* ===== PIN INPUT ===== */
.pin-input {
    display: flex;
    justify-content: center;
    gap: 0.6rem;
    margin-bottom: 1.25rem;
}

.pin-digit {
    width: 56px;
    height: 64px;
    text-align: center;
    font-family: var(--mono);
    font-size: 1.6rem;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.03);
    border: 1.5px solid var(--border-strong);
    border-radius: var(--radius);
    color: var(--text);
    transition: all var(--transition);
    -moz-appearance: textfield;
}

.pin-digit::-webkit-outer-spin-button,
.pin-digit::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.pin-digit:focus {
    outline: none;
    border-color: var(--accent);
    background: rgba(255, 255, 255, 0.06);
    box-shadow: 0 0 0 4px var(--accent-glow);
}

.pin-digit.filled {
    border-color: rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.05);
}

.pin-digit.shake {
    animation: shake 350ms ease-out;
    border-color: var(--error);
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}

.access-status {
    min-height: 1.25rem;
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-muted);
    letter-spacing: 0.01em;
}

@media (max-width: 420px) {
    .pin-digit { width: 48px; height: 56px; font-size: 1.4rem; }
    .access-card { padding: 2rem 1.5rem; }
}

/* ===== BACKGROUND GLOW ===== */
.bg-glow {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(230,0,0,0.18), transparent 60%),
        radial-gradient(ellipse 60% 40% at 80% 80%, rgba(254,180,2,0.06), transparent 60%),
        radial-gradient(ellipse 60% 40% at 20% 80%, rgba(126,9,1,0.1), transparent 60%);
    animation: bg-pulse 12s ease-in-out infinite;
}

@keyframes bg-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* ===== HEADER ===== */
.site-header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(12px);
    background: rgba(10,10,10,0.6);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.brand {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    color: inherit;
    transition: opacity var(--transition);
}

.brand:hover { opacity: 0.8; }

/* Logout-Button im Header */
.logout-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.85rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    color: var(--text-muted);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
}

.logout-btn:hover {
    background: rgba(255, 255, 255, 0.07);
    border-color: rgba(255, 255, 255, 0.22);
    color: var(--text);
}

.logout-btn svg {
    flex-shrink: 0;
}

body.locked .logout-btn {
    visibility: hidden;
}

@media (max-width: 480px) {
    .logout-btn span { display: none; }
    .logout-btn { padding: 0.5rem; }
}

/* ===== CONTAINER ===== */
.container {
    flex: 1;
    width: 100%;
    max-width: 720px;
    margin: 0 auto;
    padding: 3rem 1.5rem 4rem;
    position: relative;
}

/* ===== STEPS ===== */
.step {
    display: none;
    animation: step-in 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

.step.active {
    display: block;
}

@keyframes step-in {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== HERO ===== */
.hero {
    text-align: center;
    margin-bottom: 2.5rem;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.5rem 1rem 0.5rem 0.5rem;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    letter-spacing: 0.02em;
}

.hero-eyebrow img {
    width: 28px;
    height: 28px;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin: 0 0 1rem;
    background: linear-gradient(180deg, #FFFFFF 0%, rgba(255,255,255,0.7) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.6;
}

/* ===== CARDS ===== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: border-color var(--transition), background var(--transition);
}

.form-card {
    box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

/* ===== FORM ===== */
.field {
    margin-bottom: 1.5rem;
}

.field label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 0.5rem;
    letter-spacing: -0.01em;
}

.field input {
    width: 100%;
    padding: 1rem 1.125rem;
    background: rgba(255,255,255,0.03);
    border: 1.5px solid var(--border-strong);
    border-radius: var(--radius);
    color: var(--text);
    font-family: inherit;
    font-size: 1.05rem;
    transition: all var(--transition);
}

.field input::placeholder {
    color: var(--text-dim);
}

.field input:hover {
    background: rgba(255,255,255,0.05);
    border-color: rgba(255,255,255,0.22);
}

.field input:focus {
    outline: none;
    border-color: var(--accent);
    background: rgba(255,255,255,0.05);
    box-shadow: 0 0 0 4px var(--accent-glow);
}

#code {
    font-family: var(--mono);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-size: 1.1rem;
    font-weight: 500;
}

#code::placeholder {
    text-transform: none;
    letter-spacing: normal;
    font-family: var(--font);
    font-weight: 400;
}

.field-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
    line-height: 1.5;
}

.privacy-hint {
    font-size: 0.85rem;
    color: var(--text-dim);
    text-align: center;
    margin: 1.25rem 0 0;
    line-height: 1.5;
}

.privacy-hint.center { text-align: center; }

.hint-icon {
    display: inline-block;
    vertical-align: -2px;
    margin-right: 0.4em;
    color: var(--text-muted);
    opacity: 0.85;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.95rem 1.75rem;
    border: 1.5px solid transparent;
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition);
    white-space: nowrap;
    letter-spacing: -0.01em;
    color: white;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--accent);
    box-shadow: 0 8px 24px var(--accent-glow), inset 0 1px 0 rgba(255,255,255,0.15);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(255,255,255,0.12), transparent);
    pointer-events: none;
}

.btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 12px 32px var(--accent-glow), inset 0 1px 0 rgba(255,255,255,0.2);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-ghost {
    background: transparent;
    border-color: var(--border-strong);
    color: var(--text);
    box-shadow: none;
}

.btn-ghost:hover:not(:disabled) {
    background: rgba(255,255,255,0.04);
    border-color: rgba(255,255,255,0.25);
    transform: translateY(-1px);
}

.btn-block {
    width: 100%;
}

.btn-large {
    padding: 1.1rem 2.25rem;
    font-size: 1.05rem;
}

.btn.is-loading {
    opacity: 0.85;
    cursor: progress;
}

/* ===== ALERTS ===== */
.alert {
    padding: 0.95rem 1.25rem;
    border-radius: var(--radius);
    border: 1px solid;
    font-size: 0.95rem;
    margin-bottom: 1.25rem;
    animation: alert-in 300ms ease-out;
}

@keyframes alert-in {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

.alert.error {
    background: rgba(239,68,68,0.08);
    border-color: rgba(239,68,68,0.3);
    color: #FCA5A5;
}

/* ===== PREVIEW ===== */
.preview-header {
    text-align: center;
    margin-bottom: 2rem;
}

.preview-header h2 {
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    font-weight: 700;
    margin: 0 0 0.75rem;
    letter-spacing: -0.02em;
}

.preview-stage {
    margin-bottom: 1.5rem;
}

.preview-document-wrap {
    position: relative;
    background: white;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow:
        0 30px 80px rgba(0,0,0,0.6),
        0 0 0 1px var(--border-strong);
    aspect-ratio: 1 / 1.414; /* A4 portrait */
    max-width: 600px;
    margin: 0 auto;
}

#preview-frame {
    width: 100%;
    height: 100%;
    border: 0;
    display: block;
}

.action-row {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 1.5rem;
}

@media (max-width: 600px) {
    .action-row { flex-direction: column-reverse; }
    .action-row .btn { width: 100%; }
}

/* ===== SUCCESS ===== */
.success-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 3rem 2rem;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.success-icon {
    margin-bottom: 1.5rem;
    display: inline-block;
    animation: success-pop 600ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes success-pop {
    0% { transform: scale(0); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

.success-card h2 {
    font-size: 2rem;
    font-weight: 700;
    margin: 0 0 0.75rem;
    letter-spacing: -0.02em;
}

.success-card p {
    color: var(--text-muted);
    max-width: 440px;
    margin: 0 auto 2rem;
}

/* ===== FOOTER ===== */
.site-footer {
    padding: 2rem 1.5rem;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-dim);
    font-size: 0.875rem;
    margin-top: auto;
}

.footer-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.footer-inner a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition);
}

.footer-inner a:hover { color: var(--text); }

.footer-sep {
    color: var(--text-dim);
}

/* ===== MOBILE ===== */
@media (max-width: 600px) {
    .container { padding: 2rem 1rem 3rem; }
    .card { padding: 1.5rem; }
    .site-header { padding: 1.25rem 1rem; }
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}