/* ==============================================
   BLIXORA TOOLS - MODERN CSS DESIGN SYSTEM
   ============================================== */

/* ============= CSS VARIABLES ============= */
:root {
  /* Colors - Light Theme */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #64748b;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-success: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-dark: linear-gradient(135deg, #434343 0%, #000000 100%);

  /* Status Colors */
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --info: #3b82f6;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

  /* Glass Effect */
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.2);
  --glass-blur: blur(10px);

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

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Transitions */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme - Enhanced */
[data-theme="dark"] {
  --bg-primary: #0a0f1a;
  --bg-secondary: #121929;
  --bg-tertiary: #1e2a3a;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-tertiary: #64748b;

  --glass-bg: rgba(10, 15, 26, 0.85);
  --glass-border: rgba(255, 255, 255, 0.08);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
}

[data-theme="dark"] .tool-card {
  background: linear-gradient(145deg, var(--bg-secondary), var(--bg-tertiary));
  border: 1px solid var(--glass-border);
}

[data-theme="dark"] .upload-zone {
  background: linear-gradient(145deg, var(--bg-secondary), var(--bg-tertiary));
  border-color: var(--glass-border);
}

/* ============= RESET & BASE ============= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background var(--transition-base), color var(--transition-base);
}

/* ============= TYPOGRAPHY ============= */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.5rem;
  font-weight: 600;
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
}

/* ============= LAYOUT ============= */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

section {
  padding: var(--spacing-xl) 0;
}

/* ============= HEADER ============= */
.header {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: all var(--transition-base);
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 1.5rem;
  font-weight: 800;
  text-decoration: none;
  color: var(--text-primary);
  transition: transform var(--transition-fast);
}

.logo:hover {
  transform: scale(1.05);
}

.logo-icon {
  font-size: 2rem;
  animation: glow 2s ease-in-out infinite;
}

@keyframes glow {

  0%,
  100% {
    filter: drop-shadow(0 0 5px rgba(102, 126, 234, 0.5));
  }

  50% {
    filter: drop-shadow(0 0 15px rgba(102, 126, 234, 0.8));
  }
}

.nav {
  display: flex;
  gap: var(--spacing-md);
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: all var(--transition-fast);
  transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 80%;
}

.nav-link:hover {
  color: var(--text-primary);
}

/* Theme Toggle */
.theme-toggle {
  background: var(--bg-tertiary);
  border: none;
  border-radius: var(--radius-md);
  padding: var(--spacing-xs);
  cursor: pointer;
  font-size: 1.25rem;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  transform: rotate(180deg);
  background: var(--gradient-primary);
}

/* ============= HERO SECTION ============= */
.hero {
  text-align: center;
  padding: var(--spacing-xl) 0;
  background: linear-gradient(145deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: var(--gradient-primary);
  opacity: 0.1;
  border-radius: 50%;
  filter: blur(80px);
  animation: float 6s ease-in-out infinite;
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }

  50% {
    transform: translateY(-30px) rotate(5deg);
  }
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  margin-bottom: var(--spacing-md);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
}

/* ============= UPLOAD ZONE ============= */
.upload-zone {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 2px dashed var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.upload-zone::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-base);
  z-index: -1;
}

.upload-zone:hover {
  border-color: #667eea;
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.upload-zone:hover::before {
  opacity: 0.1;
}

.upload-zone.drag-over {
  border-color: #667eea;
  background: var(--glass-bg);
  transform: scale(1.02);
  border-style: solid;
}

.upload-icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-sm);
  animation: pulse 2s infinite;
}

@keyframes pulse {

  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.1);
  }
}

.upload-text {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.upload-link {
  color: #667eea;
  text-decoration: underline;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.upload-link:hover {
  color: #764ba2;
}

.upload-hint {
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

/* ============= TOOLS GRID ============= */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.tool-card {
  background: var(--bg-secondary);
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  transition: all var(--transition-base);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--gradient-primary);
  opacity: 0;
  transition: all var(--transition-base);
  z-index: 0;
}

.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: #667eea;
}

.tool-card:hover::before {
  left: 0;
  opacity: 0.1;
}

.tool-card:active {
  transform: translateY(-2px);
}

.tool-icon {
  font-size: 2rem;
  z-index: 1;
  transition: transform var(--transition-fast);
}

.tool-card:hover .tool-icon {
  transform: scale(1.2);
}

.tool-info {
  flex: 1;
  z-index: 1;
}

.tool-card h4 {
  color: var(--text-primary);
  font-size: 1.125rem;
  margin-bottom: 0.25rem;
}

.tool-card p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin: 0;
}

/* ============= FORM INPUTS ============= */
.form-input {
  width: 100%;
  padding: var(--spacing-sm);
  background: var(--bg-tertiary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

.form-input::placeholder {
  color: var(--text-tertiary);
}

/* ============= BUTTONS ============= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:active::after {
  width: 200px;
  height: 200px;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: var(--bg-secondary);
}

.btn-success {
  background: var(--gradient-success);
  color: white;
}

.btn-danger {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  color: white;
}

/* ============= PROGRESS BAR ============= */
.progress-container {
  width: 100%;
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: var(--spacing-md) 0;
}

.progress-bar {
  height: 8px;
  background: var(--gradient-success);
  border-radius: var(--radius-lg);
  transition: width var(--transition-base);
  position: relative;
  overflow: hidden;
}

.progress-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background: linear-gradient(90deg,
      transparent,
      rgba(255, 255, 255, 0.3),
      transparent);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%);
  }

  100% {
    transform: translateX(100%);
  }
}

/* ============= SKELETON LOADER ============= */
.skeleton {
  background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-secondary) 50%, var(--bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-md);
}

.skeleton-text {
  height: 1rem;
  margin-bottom: 0.5rem;
}

.skeleton-title {
  height: 2rem;
  width: 60%;
  margin-bottom: 1rem;
}

.skeleton-card {
  height: 100px;
  margin-bottom: var(--spacing-md);
}

@keyframes skeleton-loading {
  0% {
    background-position: 200% 0;
  }

  100% {
    background-position: -200% 0;
  }
}

/* ============= TOAST NOTIFICATIONS ============= */
.toast-container {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.toast {
  background: var(--bg-primary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-xl);
  animation: slideIn 0.3s ease-out;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  min-width: 300px;
}

.toast.success {
  border-left: 4px solid var(--success);
}

.toast.error {
  border-left: 4px solid var(--error);
}

.toast.warning {
  border-left: 4px solid var(--warning);
}

.toast.info {
  border-left: 4px solid var(--info);
}

.toast-icon {
  font-size: 1.5rem;
}

.toast-message {
  flex: 1;
  color: var(--text-primary);
}

.toast-close {
  background: none;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  font-size: 1.25rem;
  padding: 0;
}

@keyframes slideIn {
  from {
    transform: translateX(400px);
    opacity: 0;
  }

  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideOut {
  from {
    transform: translateX(0);
    opacity: 1;
  }

  to {
    transform: translateX(400px);
    opacity: 0;
  }
}

/* ============= SUCCESS ANIMATION ============= */
.success-checkmark {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-md);
  position: relative;
}

.success-checkmark__circle {
  stroke-dasharray: 166;
  stroke-dashoffset: 166;
  stroke: var(--success);
  fill: none;
  animation: stroke 0.6s cubic-bezier(0.65, 0, 0.45, 1) forwards;
}

.success-checkmark__check {
  transform-origin: 50% 50%;
  stroke-dasharray: 48;
  stroke-dashoffset: 48;
  stroke: var(--success);
  animation: stroke 0.3s cubic-bezier(0.65, 0, 0.45, 1) 0.6s forwards;
}

@keyframes stroke {
  100% {
    stroke-dashoffset: 0;
  }
}

.confetti {
  position: fixed;
  pointer-events: none;
  z-index: 9998;
}

/* ============= FOOTER ============= */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--glass-border);
  padding: var(--spacing-xl) 0 var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.footer-links h4 {
  margin-bottom: var(--spacing-sm);
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
  position: relative;
  display: inline-block;
}

.footer-links a:hover {
  color: var(--text-primary);
  transform: translateX(4px);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--glass-border);
  color: var(--text-tertiary);
}

/* ============= RESPONSIVE ============= */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }

  .nav {
    display: none;
  }

  .tools-grid {
    grid-template-columns: 1fr;
  }

  .footer-content {
    grid-template-columns: 1fr 1fr;
  }

  .toast-container {
    left: var(--spacing-sm);
    right: var(--spacing-sm);
  }

  .toast {
    min-width: auto;
  }
}

@media (max-width: 480px) {
  .footer-content {
    grid-template-columns: 1fr;
  }
}

/* ============= UTILITIES ============= */
.hidden {
  display: none !important;
}

.loading {
  pointer-events: none;
  opacity: 0.6;
}

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

.text-success {
  color: var(--success) !important;
}

.text-error {
  color: var(--error) !important;
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.fade-in {
  animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Page Transition */
.page-transition {
  animation: pageSlide 0.4s ease-out;
}

@keyframes pageSlide {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

main {
  animation: pageSlide 0.4s ease-out;
}