/* 
   Premium Bio Page Design System
   Tailored for Mobile Viewports with Rich Glassmorphism, 
   Drifting Background Glows, and Multi-theme Support.
*/

/* --- Design Tokens & Variables --- */
:root {
  /* Fonts */
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Animation Timings */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --card-radius: 20px;
  --button-radius: 14px;
}

/* --- Dark Theme (Default) --- */
[data-theme="dark"] {
  --bg-color: #05070a;
  --bg-gradient: radial-gradient(circle at 50% 0%, #0c0e14 0%, #05070a 100%);
  
  --card-bg: rgba(18, 22, 33, 0.45);
  --card-border: rgba(255, 255, 255, 0.04);
  --card-border-hover: rgba(99, 102, 241, 0.3);
  --card-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --card-shadow-hover: 0 8px 32px rgba(99, 102, 241, 0.12);

  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #525a6c;

  --accent-primary: #4f46e5; /* Refined Indigo */
  --accent-secondary: #7c3aed; /* Refined Violet */
  --accent-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  --accent-gradient-hover: linear-gradient(135deg, #4338ca 0%, #6d28d9 100%);
  --accent-glow: rgba(79, 70, 229, 0.2);

  --glow-blob-1: rgba(79, 70, 229, 0.08);
  --glow-blob-2: rgba(124, 58, 237, 0.06);

  --toast-bg: rgba(17, 24, 39, 0.95);
  --toast-border: rgba(255, 255, 255, 0.08);
  --input-bg: rgba(255, 255, 255, 0.02);
  --input-border: rgba(255, 255, 255, 0.06);
}

/* --- Light Theme --- */
[data-theme="light"] {
  --bg-color: #f8fafc;
  --bg-gradient: radial-gradient(circle at 50% 0%, #eef2ff 0%, #f8fafc 100%);
  
  --card-bg: rgba(255, 255, 255, 0.7);
  --card-border: rgba(0, 0, 0, 0.06);
  --card-border-hover: rgba(99, 102, 241, 0.25);
  --card-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.04);
  --card-shadow-hover: 0 12px 40px 0 rgba(99, 102, 241, 0.08);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --accent-primary: #4f46e5;
  --accent-secondary: #7c3aed;
  --accent-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  --accent-gradient-hover: linear-gradient(135deg, #4338ca 0%, #6d28d9 100%);
  --accent-glow: rgba(79, 70, 229, 0.15);

  --glow-blob-1: rgba(99, 102, 241, 0.06);
  --glow-blob-2: rgba(168, 85, 247, 0.05);

  --toast-bg: rgba(255, 255, 255, 0.95);
  --toast-border: rgba(0, 0, 0, 0.05);
  --input-bg: rgba(0, 0, 0, 0.02);
  --input-border: rgba(0, 0, 0, 0.08);
}

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

html, body {
  width: 100%;
  min-height: 100%;
  font-family: var(--font-body);
  color: var(--text-primary);
  background-color: var(--bg-color);
  background-image: var(--bg-gradient);
  background-attachment: fixed;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Hide scrollbar for clean app-like appearance */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--card-border-hover);
  border-radius: 10px;
}

/* --- Background Glow Animation --- */
.bg-glow-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.glow-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.5;
  mix-blend-mode: screen;
}

/* For light mode mix-blend-mode adjustments */
[data-theme="light"] .glow-blob {
  mix-blend-mode: multiply;
  filter: blur(100px);
  opacity: 0.5;
}

.blob-1 {
  top: -10%;
  left: -10%;
  width: 60vw;
  height: 60vw;
  background-color: var(--glow-blob-1);
  animation: float-blob-1 25s infinite alternate ease-in-out;
}

.blob-2 {
  bottom: -10%;
  right: -10%;
  width: 70vw;
  height: 70vw;
  background-color: var(--glow-blob-2);
  animation: float-blob-2 30s infinite alternate ease-in-out;
}

@keyframes float-blob-1 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(10%, 15%) scale(1.1); }
  100% { transform: translate(-5%, -5%) scale(0.9); }
}

@keyframes float-blob-2 {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-15%, -10%) scale(1.05); }
  100% { transform: translate(5%, 5%) scale(0.95); }
}

/* --- App Container --- */
.app-container {
  width: 100%;
  max-width: 440px; /* Refined phone width */
  margin: 0 auto;
  padding: 24px 20px 48px 20px;
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-slow);
}

/* Desktop App Frame Presentation */
@media (min-width: 480px) {
  .app-container {
    margin: 40px auto;
    border-radius: 36px;
    border: 1px solid var(--card-border);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
    min-height: calc(100vh - 80px);
    background: var(--bg-gradient);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
  }
}

/* --- Navigation/Top Actions Bar --- */
.top-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
  width: 100%;
  z-index: 10;
}

.icon-btn {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--text-primary);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  outline: none;
}

.icon-btn:hover, .icon-btn:focus-visible {
  transform: scale(1.05);
  border-color: var(--card-border-hover);
  background: rgba(255, 255, 255, 0.08);
}

.icon-btn:active {
  transform: scale(0.95);
}

.icon-btn svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
  transition: transform var(--transition-normal);
}

/* Theme icon specific animations */
.theme-toggle-btn .sun-icon {
  display: none;
}

[data-theme="light"] .theme-toggle-btn .sun-icon {
  display: block;
}

[data-theme="light"] .theme-toggle-btn .moon-icon {
  display: none;
}

/* --- Profile Section --- */
.profile-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin-bottom: 36px;
  animation: fade-in-down var(--transition-slow) forwards;
}

.avatar-container {
  position: relative;
  width: 110px;
  height: 110px;
  margin-bottom: 20px;
}

.avatar-ring {
  position: absolute;
  top: -5px;
  left: -5px;
  right: -5px;
  bottom: -5px;
  border-radius: 50%;
  background: var(--accent-gradient);
  z-index: 1;
  padding: 3px;
  animation: rotate-ring 12s infinite linear;
}

.avatar-img-wrapper {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: var(--bg-color);
  overflow: hidden;
  z-index: 2;
  border: 3px solid var(--bg-color);
  display: flex;
  align-items: center;
  justify-content: center;
}

.profile-avatar {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.avatar-container:hover .profile-avatar {
  transform: scale(1.08);
}

/* Decorative SVG Avatar silhouette as fallback */
.avatar-svg-fallback {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #1e293b, #0f172a);
  fill: #f8fafc;
}

.status-badge {
  position: absolute;
  bottom: 0;
  right: 6px;
  background: #10b981; /* Emerald green */
  border: 2.5px solid var(--bg-color);
  width: 16px;
  height: 16px;
  border-radius: 50%;
  z-index: 3;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.4);
}

.profile-info h1 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.profile-tagline {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--accent-primary);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.profile-bio {
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 380px;
  margin-bottom: 16px;
}

.meta-badges {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.badge {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  padding: 6px 12px;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.badge svg {
  width: 12px;
  height: 12px;
  fill: currentColor;
}

@keyframes rotate-ring {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* --- Action Buttons (Primary CTAs) --- */
.primary-actions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 36px;
  animation: fade-in-up var(--transition-slow) forwards;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 20px;
  font-family: var(--font-heading);
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--button-radius);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  border: none;
  outline: none;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover, .btn-primary:focus-visible {
  background: var(--accent-gradient-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-glow);
}

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

.btn-secondary {
  background: var(--card-bg);
  color: var(--text-primary);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.btn-secondary:hover, .btn-secondary:focus-visible {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--card-border-hover);
  transform: translateY(-2px);
}

[data-theme="light"] .btn-secondary:hover {
  background: rgba(0, 0, 0, 0.04);
}

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

.btn svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* --- Social Cards Feed --- */
.links-section {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 40px;
  width: 100%;
}

.section-label {
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 4px;
  padding-left: 4px;
}

/* Card Style */
.link-card {
  display: flex;
  align-items: center;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: 16px 20px;
  text-decoration: none;
  color: var(--text-primary);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--card-shadow);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  opacity: 0; /* Animated in via JS */
  transform: translateY(20px);
}

/* Shimmer border glow effect */
.link-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: var(--card-radius);
  padding: 1.5px;
  background: linear-gradient(135deg, transparent 40%, var(--accent-primary), var(--accent-secondary), transparent 60%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--transition-normal);
  pointer-events: none;
}

.link-card:hover, .link-card:focus-visible {
  transform: translateY(-3px) scale(1.01);
  border-color: var(--card-border-hover);
  box-shadow: var(--card-shadow-hover);
}

.link-card:hover::before {
  opacity: 1;
}

.card-icon-container {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--card-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 16px;
  transition: all var(--transition-normal);
  color: var(--text-primary);
  flex-shrink: 0;
}

[data-theme="light"] .card-icon-container {
  background: rgba(0, 0, 0, 0.03);
}

/* Hover effects for icons */
.link-card:hover .card-icon-container {
  background: var(--accent-gradient);
  color: #ffffff;
  border-color: transparent;
  transform: rotate(6deg) scale(1.05);
}

.card-icon-container svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

.card-info {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.card-title {
  font-family: var(--font-heading);
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.card-description {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.card-arrow {
  color: var(--text-muted);
  transition: transform var(--transition-fast);
  margin-left: 10px;
  flex-shrink: 0;
}

.card-arrow svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.link-card:hover .card-arrow {
  transform: translateX(3px);
  color: var(--accent-primary);
}

/* --- Footer --- */
.profile-footer {
  margin-top: auto;
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 6px;
  animation: fade-in var(--transition-slow) forwards;
}

.footer-brand {
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

/* --- Toast Notification --- */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translate(-50%, 100px);
  background: var(--toast-bg);
  border: 1px solid var(--toast-border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 12px 24px;
  border-radius: 50px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 100;
  opacity: 0;
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.3s ease;
  pointer-events: none;
}

.toast.show {
  transform: translate(-50%, 0);
  opacity: 1;
}

.toast svg {
  width: 16px;
  height: 16px;
  fill: #10b981; /* Green check */
}

.toast-text {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* --- Contact Form Slide-Up Modal --- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 90;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-sheet {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translate(-50%, 100%);
  width: 100%;
  max-width: 480px;
  background: var(--bg-color);
  background-image: var(--bg-gradient);
  border-top: 1px solid var(--card-border);
  border-top-left-radius: 28px;
  border-top-right-radius: 28px;
  padding: 30px 24px;
  box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.3);
  z-index: 95;
  transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

.modal-overlay.open .modal-sheet {
  transform: translate(-50%, 0);
}

.modal-drag-handle {
  width: 40px;
  height: 4px;
  background: var(--card-border);
  border-radius: 2px;
  margin: -15px auto 20px auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.modal-header h2 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
}

.modal-close-btn {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.modal-close-btn:hover {
  transform: scale(1.05);
  border-color: var(--card-border-hover);
}

.modal-close-btn svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

/* --- Form Styles --- */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

.form-input {
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  color: var(--text-primary);
  border-radius: 12px;
  padding: 12px 16px;
  font-family: var(--font-body);
  font-size: 0.92rem;
  outline: none;
  transition: all var(--transition-normal);
}

.form-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
  background: rgba(255, 255, 255, 0.05);
}

textarea.form-input {
  resize: none;
  min-height: 100px;
}

/* --- Core Keyframe Animations --- */
@keyframes fade-in-down {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* --- Card Transition Classes --- */
.link-card.fade-in-card {
  animation: fade-in-up-card 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes fade-in-up-card {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}