/*
 * Masri Programmer — Links Page
 * Design system derived from rechnung_vorlage.html
 * Glassmorphism · Inter · Dark background
 * v2.0 — Production-ready with FOUC prevention, accessibility, CRO enhancements
 */

/* ── Custom Properties ─────────────────────────── */
:root {
  /* Colors — from invoice template */
  --color-text:        hsl(0 0% 92.1%);
  --color-text-muted:  hsl(0 0% 60%);
  --color-bg:          #000000;
  --color-surface:     hsla(0, 0%, 92%, 0.08);
  --color-border:      hsla(0, 0%, 92%, 0.15);
  --color-accent:      #3b82f6;
  --color-accent-hover:#60a5fa;
  --color-success:     #22c55e;

  /* Glass card */
  --glass-bg:          hsla(0, 0%, 100%, 0.06);
  --glass-border:      hsla(0, 0%, 100%, 0.12);
  --glass-blur:        20px;

  /* Typography */
  --font-sans: 'Inter', 'Instrument Sans', ui-sans-serif, system-ui, -apple-system, sans-serif;

  /* Spacing */
  --spacing-xs:  0.5rem;
  --spacing-sm:  0.75rem;
  --spacing-md:  1rem;
  --spacing-lg:  1.5rem;
  --spacing-xl:  2rem;
  --spacing-2xl: 3rem;

  /* Radius */
  --radius-sm:   0.5rem;
  --radius-md:   0.625rem;
  --radius-lg:   0.875rem;
  --radius-full: 9999px;
}

/* ── FOUC Prevention ────────────────────────────── */
html {
  background-color: #000000;
}

/* ── Base ───────────────────────────────────────── */
body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Page Layout ────────────────────────────────── */
.page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  min-height: 100vh;
  padding: var(--spacing-2xl) var(--spacing-md) 6.5rem;
}

/* ── Glass Card ─────────────────────────────────── */
.card {
  width: 100%;
  max-width: 420px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  padding: var(--spacing-2xl) var(--spacing-xl);
  text-align: center;
  animation: cardFadeIn 0.6s ease-out;
}

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

/* ── Header / Profile ──────────────────────────── */
.profile {
  margin-bottom: var(--spacing-xl);
}

.logo {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 10px;
  animation: logoFloat 4s ease-in-out infinite;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

@keyframes logoFloat {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}

.logo:hover {
  transform: scale(1.08);
  box-shadow: 0 4px 24px hsla(0, 0%, 100%, 0.06);
}

.logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.profile h1 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0 0 var(--spacing-xs);
  color: var(--color-text);
}

.profile .subtitle {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0 0 var(--spacing-sm);
  font-weight: 400;
}

.profile .contact-info {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.profile .contact-info a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.profile .contact-info a:hover,
.profile .contact-info a:focus-visible {
  color: var(--color-text);
}

/* ── Availability Badge ─────────────────────────── */
.availability-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.85rem;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-success);
  border: 1px solid hsla(142, 71%, 45%, 0.25);
  border-radius: var(--radius-full);
  background: hsla(142, 71%, 45%, 0.08);
  margin-top: var(--spacing-md);
}

.availability-badge .pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.5; transform: scale(0.8); }
}

/* ── Divider ────────────────────────────────────── */
.divider {
  width: 60px;
  height: 1px;
  background: var(--glass-border);
  margin: 0 auto var(--spacing-xl);
  border: none;
}

/* ── Section Labels ─────────────────────────────── */
.section-label {
  display: block;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
  text-align: left;
}

/* ── Buttons / Links ────────────────────────────── */
.button-stack {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 48px;
  padding: 0.7rem 1rem;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: var(--font-sans);
  text-decoration: none;
  white-space: normal;
  word-break: break-word;
  background-color: var(--button-background, var(--glass-bg));
  color: var(--button-text, var(--color-text));
  border: var(--button-border, 1px solid var(--glass-border));
  border-radius: var(--radius-md);
  cursor: pointer;
  box-sizing: border-box;
  line-height: 1.3;
  text-align: center;
  transition: filter 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;

  /* Staggered animation */
  opacity: 0;
  transform: translateY(30px);
  animation: buttonSlideIn 0.8s cubic-bezier(0.25, 1, 0.5, 1) both;
}

@keyframes buttonSlideIn {
  0% {
    opacity: 0;
    transform: translateY(30px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

.button:hover {
  filter: brightness(1.15);
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 24px hsla(0, 0%, 0%, 0.4);
  color: var(--button-text, var(--color-text));
  text-decoration: none;
}

.button:active {
  transform: translateY(0);
  filter: brightness(0.95);
}

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

/* ── Button Group Separator ─────────────────────── */
.button-group-separator {
  height: var(--spacing-sm);
}

/* ── Button Icons ───────────────────────────────── */
.icon {
  width: 1.2rem;
  height: 1.2rem;
  margin-right: 0.5rem;
  flex-shrink: 0;
  filter: var(--icon-filter, none);
}

/* ── Social Proof / Trust Badge ─────────────────── */
.trust-section {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.trust-title {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
}

.trust-stats {
  display: flex;
  justify-content: space-around;
  gap: var(--spacing-md);
}

.trust-stat {
  text-align: center;
}

.trust-stat .stat-value {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.2;
}

.trust-stat .stat-label {
  display: block;
  font-size: 0.6875rem;
  color: var(--color-text-muted);
  margin-top: 0.2rem;
}

/* ── Footer ─────────────────────────────────────── */
.footer {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--glass-border);
  text-align: center;
}

.footer .email-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s ease, transform 0.2s ease;
}

.footer .email-link:hover,
.footer .email-link:focus-visible {
  color: var(--color-accent-hover);
  transform: translateY(-1px);
}

.footer .email-icon {
  width: 14px;
  height: 14px;
  opacity: 0.8;
}

.footer .copyright {
  font-size: 0.6875rem;
  color: var(--color-text-muted);
  margin-top: var(--spacing-sm);
  opacity: 0.6;
}

.footer .copyright a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer .copyright a:hover,
.footer .copyright a:focus-visible {
  color: var(--color-text);
}

/* ── Sticky CTA ─────────────────────────────────── */
.sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 50;
  padding: var(--spacing-sm) var(--spacing-md);
  background: #ffff;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  transform: translateY(100%);
  transition: transform 0.35s ease;
}

.sticky-cta.visible {
  transform: translateY(0);
}

.sticky-cta-button {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  color: #fff;
  background: var(--color-accent);
  border: none;
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.sticky-cta-button:hover,
.sticky-cta-button:focus-visible {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}

.sticky-cta-text {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  display: none;
}

/* ── Loading State ──────────────────────────────── */
.loading-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 240px;
}

.loading-logo {
  width: 64px;
  height: 64px;
  animation: loadingPulse 1.8s ease-in-out infinite;
}

@keyframes loadingPulse {
  0%, 100% {
    transform: scale(0.9);
    opacity: 0.4;
  }
  50% {
    transform: scale(1.05);
    opacity: 0.95;
  }
}

/* ── Skip Link (Accessibility) ──────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  z-index: 100;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-accent);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: 0 0 var(--radius-sm) 0;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
}

/* ── Responsive ─────────────────────────────────── */
@media (max-width: 480px) {
  .card {
    padding: var(--spacing-xl) var(--spacing-lg);
    border-radius: var(--radius-md);
  }

  .profile h1 {
    font-size: 1.5rem;
  }

  .page {
    padding: var(--spacing-lg) var(--spacing-sm) 6.5rem;
  }

  .trust-stats {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .sticky-cta-text {
    display: none;
  }
}

@media (min-width: 481px) {
  .sticky-cta-text {
    display: inline;
  }
}

@media (min-width: 481px) and (max-width: 768px) {
  .card {
    max-width: 440px;
  }
}

@media (min-width: 769px) {
  .page {
    justify-content: center;
    padding-bottom: 6.5rem;
  }
}

/* ----------------------------------------------
 * User Animations
 * ---------------------------------------------- */

.heartbeat {
	-webkit-animation: heartbeat 1.5s ease-in-out infinite both;
	        animation: heartbeat 1.5s ease-in-out infinite both;
}

@-webkit-keyframes heartbeat {
  from {
    -webkit-transform: scale(1);
            transform: scale(1);
    -webkit-transform-origin: center center;
            transform-origin: center center;
    -webkit-animation-timing-function: ease-out;
            animation-timing-function: ease-out;
  }
  10% {
    -webkit-transform: scale(0.91);
            transform: scale(0.91);
    -webkit-animation-timing-function: ease-in;
            animation-timing-function: ease-in;
  }
  17% {
    -webkit-transform: scale(0.98);
            transform: scale(0.98);
    -webkit-animation-timing-function: ease-out;
            animation-timing-function: ease-out;
  }
  33% {
    -webkit-transform: scale(0.87);
            transform: scale(0.87);
    -webkit-animation-timing-function: ease-in;
            animation-timing-function: ease-in;
  }
  45% {
    -webkit-transform: scale(1);
            transform: scale(1);
    -webkit-animation-timing-function: ease-out;
            animation-timing-function: ease-out;
  }
}
@keyframes heartbeat {
  from {
    -webkit-transform: scale(1);
            transform: scale(1);
    -webkit-transform-origin: center center;
            transform-origin: center center;
    -webkit-animation-timing-function: ease-out;
            animation-timing-function: ease-out;
  }
  10% {
    -webkit-transform: scale(0.91);
            transform: scale(0.91);
    -webkit-animation-timing-function: ease-in;
            animation-timing-function: ease-in;
  }
  17% {
    -webkit-transform: scale(0.98);
            transform: scale(0.98);
    -webkit-animation-timing-function: ease-out;
            animation-timing-function: ease-out;
  }
  33% {
    -webkit-transform: scale(0.87);
            transform: scale(0.87);
    -webkit-animation-timing-function: ease-in;
            animation-timing-function: ease-in;
  }
  45% {
    -webkit-transform: scale(1);
            transform: scale(1);
    -webkit-animation-timing-function: ease-out;
            animation-timing-function: ease-out;
  }
}

.focus-in-expand {
	-webkit-animation: focus-in-expand 0.8s cubic-bezier(0.250, 0.460, 0.450, 0.940) both;
	        animation: focus-in-expand 0.8s cubic-bezier(0.250, 0.460, 0.450, 0.940) both;
}

@-webkit-keyframes focus-in-expand {
  0% {
    letter-spacing: -0.5em;
    -webkit-filter: blur(12px);
            filter: blur(12px);
    opacity: 0;
  }
  100% {
    -webkit-filter: blur(0px);
            filter: blur(0px);
    opacity: 1;
  }
}
@keyframes focus-in-expand {
  0% {
    letter-spacing: -0.5em;
    -webkit-filter: blur(12px);
            filter: blur(12px);
    opacity: 0;
  }
  100% {
    -webkit-filter: blur(0px);
            filter: blur(0px);
    opacity: 1;
  }
}