/* ===== CSS Variables & Reset ===== */
:root {
  --bg-primary: #050508;
  --bg-secondary: #0d0d12;
  --bg-card: rgba(18, 18, 26, 0.7);
  --bg-input: rgba(25, 25, 35, 0.8);
  --bg-input-focus: rgba(30, 30, 45, 1);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-primary: #6366f1;
  --accent-secondary: #4f46e5;
  --accent-glow: rgba(99, 102, 241, 0.5);

  --success: #10b981;
  --error: #ef4444;
  --warning: #f59e0b;

  --border-color: rgba(255, 255, 255, 0.06);
  --border-focus: rgba(99, 102, 241, 0.4);
  --border-radius-sm: 8px;
  --border-radius: 14px;
  --border-radius-lg: 24px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 50px -12px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15);

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);

  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-family);
  background: var(--bg-primary) url('background.png') no-repeat center center fixed;
  background-size: cover;
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ===== Background Effects ===== */
.background-effects {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  animation: float 20s ease-in-out infinite;
}

.orb-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.4) 0%, transparent 70%);
  top: -200px;
  left: -200px;
}

.orb-2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.3) 0%, transparent 70%);
  top: 50%;
  right: -150px;
  animation-delay: -7s;
}

.orb-3 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.25) 0%, transparent 70%);
  bottom: -100px;
  left: 30%;
  animation-delay: -14s;
}

@keyframes float {

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

  33% {
    transform: translate(30px, -30px) scale(1.05);
  }

  66% {
    transform: translate(-20px, 20px) scale(0.95);
  }
}

/* ===== Layout ===== */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* ===== Header ===== */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4rem;
  padding: 1rem 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-icon {
  font-size: 1.5rem;
  background: var(--accent-primary);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  padding: 0.625rem 1.25rem;
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
}

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

/* ===== Hero ===== */
.hero {
  text-align: center;
  margin-bottom: 4rem;
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  letter-spacing: -0.04em;
}

.gradient-text {
  color: var(--accent-primary);
  /* Keeping the name but moving away from complex gradients for a cleaner look */
  background: none;
  -webkit-text-fill-color: initial;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.5;
}

/* ===== Cards ===== */
.shortener-card,
.stats-card,
.auth-card {
  background: var(--bg-card);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 3rem;
  margin-bottom: 2.5rem;
  box-shadow: var(--shadow-lg);
}

.stats-card {
  background: rgba(18, 18, 26, 0.5);
  padding: 2.5rem;
}

.stats-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 2rem;
  letter-spacing: -0.02em;
}

/* ===== Forms ===== */
.input-group {
  margin-bottom: 1.5rem;
}

.input-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  margin-left: 0.25rem;
}

.input-group.main-input {
  display: flex;
  gap: 0.75rem;
  background: var(--bg-input);
  padding: 0.5rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  transition: var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.input-group.main-input:focus-within {
  border-color: var(--border-focus);
  box-shadow: var(--shadow-glow);
  background: var(--bg-input-focus);
}

input[type="url"],
input[type="text"],
input[type="password"],
input[type="email"],
select {
  width: 100%;
  padding: 1rem 1.25rem;
  font-size: 1rem;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
}

.main-input input[type="url"] {
  background: transparent;
  border: none;
  padding: 0.75rem 1rem;
}

.main-input input[type="url"]:focus {
  box-shadow: none;
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--accent-primary);
  background: var(--bg-input-focus);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.input-hint {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
  margin-left: 0.25rem;
}

.slug-input-wrapper {
  display: flex;
  align-items: center;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.slug-prefix {
  padding: 1rem;
  color: var(--text-muted);
  font-size: 0.875rem;
  white-space: nowrap;
  border-right: 1px solid var(--border-color);
  background: rgba(0, 0, 0, 0.2);
}

.slug-input-wrapper input {
  border: none;
  border-radius: 0;
  background: transparent;
}

.slug-input-wrapper input:focus {
  box-shadow: none;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  padding: 0.875rem 1.75rem;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-primary);
  color: white;
  box-shadow: 0 4px 14px 0 rgba(99, 102, 241, 0.39);
}

.btn-primary:hover {
  background: var(--accent-secondary);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.23);
}

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

.btn-secondary {
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-input-focus);
  border-color: var(--text-muted);
  transform: translateY(-1px);
}

.btn-copy {
  padding: 0 1.5rem;
  background: var(--accent-primary);
  color: white;
  border-radius: var(--border-radius-sm);
}

.btn-copy svg {
  width: 1rem;
  height: 1rem;
}

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

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

/* ===== Advanced Options ===== */
.background-effects {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  /* background removed to show body image */
  backdrop-filter: blur(5px);
}

/* ===== Advanced Options ===== */
.toggle-advanced {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  padding: 0.5rem 0;
  transition: color var(--transition-fast);
}

.toggle-advanced:hover {
  color: var(--text-primary);
}

.toggle-advanced .chevron {
  width: 1rem;
  height: 1rem;
  transition: transform var(--transition-normal);
}

.toggle-advanced.active .chevron {
  transform: rotate(180deg);
}

.advanced-fields {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  margin-top: 1rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 640px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }
}

/* ===== Result ===== */
.result {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  animation: slideIn 0.3s ease;
}

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

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

.result-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--success);
  font-weight: 600;
  margin-bottom: 1rem;
}

.result-icon {
  width: 1.5rem;
  height: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--success);
  color: white;
  border-radius: 50%;
  font-size: 0.75rem;
}

.short-url-display {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.short-url-display input {
  flex: 1;
  background: var(--bg-secondary);
  font-weight: 500;
  color: var(--accent-primary);
}

.result-meta {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

/* ===== Stats ===== */
.stats-form {
  margin-bottom: 2rem;
}

.stats-form .input-group {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 0;
  background: var(--bg-input);
  padding: 0.5rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
}

.stats-form .input-group input {
  background: transparent;
  border: none;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin-bottom: 2rem;
}

@media (min-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat-item {
  text-align: left;
  padding: 1.5rem;
  background: var(--bg-input);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  transition: var(--transition-normal);
}

.stat-item:hover {
  border-color: var(--border-focus);
  transform: translateY(-2px);
}

.stat-value {
  display: block;
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.1em;
}

.stat-url {
  padding: 1.25rem;
  background: var(--bg-input);
  border-radius: var(--border-radius);
  font-size: 0.9375rem;
  border-left: 4px solid var(--accent-primary);
}

.stat-url a {
  color: var(--accent-primary);
  text-decoration: none;
}

.stat-url a:hover {
  text-decoration: underline;
}

/* ===== Features ===== */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 4rem;
}

.feature-card {
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  text-align: left;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.feature-card:hover {
  border-color: var(--border-focus);
  transform: translateY(-5px);
  background: rgba(25, 25, 35, 0.4);
}

.feature-icon {
  font-size: 2rem;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-input);
  border-radius: 12px;
  margin-bottom: 0.5rem;
}

.feature-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
}

.feature-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== Footer ===== */
.footer {
  text-align: center;
  padding: 2rem 0;
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  padding: 1rem 1.5rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  transition: transform var(--transition-normal);
}

.toast.show {
  transform: translateX(-50%) translateY(0);
}

.toast.success {
  border-color: var(--success);
}

.toast.error {
  border-color: var(--error);
}

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

.spinner {
  width: 1.25rem;
  height: 1.25rem;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero-title {
    font-size: 3rem;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 1.5rem 1rem;
  }

  .header {
    margin-bottom: 2.5rem;
  }

  .hero {
    margin-bottom: 3rem;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .shortener-card,
  .stats-card,
  .auth-card {
    padding: 1.5rem;
  }

  .input-group.main-input {
    flex-direction: column;
    padding: 0.75rem;
    background: transparent;
    border: none;
    box-shadow: none;
  }

  .main-input input[type="url"] {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 0.75rem;
  }

  .main-input .btn-primary {
    width: 100%;
    padding: 1rem;
  }

  .stats-form .input-group {
    flex-direction: column;
    background: transparent;
    border: none;
    padding: 0;
  }

  .stats-form input {
    background: var(--bg-input) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: var(--border-radius);
    margin-bottom: 0.75rem;
  }

  .stats-form .btn {
    width: 100%;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }
}

/* ===== Auth Pages ===== */
.auth-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 80vh;
}

.auth-card {
  width: 100%;
  max-width: 450px;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
}

.auth-header {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-header h1 {
  font-size: 1.75rem;
  margin: 1rem 0 0.5rem;
}

.auth-header p {
  color: var(--text-secondary);
}

.auth-form .input-group {
  margin-bottom: 1.5rem;
}

.auth-footer {
  text-align: center;
  margin-top: 1.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.auth-footer a {
  color: var(--accent-primary);
  text-decoration: none;
  font-weight: 600;
}

.auth-error {
  margin-top: 1rem;
  padding: 0.75rem;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--error);
  border-radius: var(--border-radius);
  color: var(--error);
  font-size: 0.875rem;
  text-align: center;
}

/* ===== Dashboards & Grid ===== */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.btn-block {
  width: 100%;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
}

/* ===== Chart Styles ===== */
canvas {
  width: 100% !important;
  height: 100% !important;
}

.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100px;
  color: var(--text-muted);
}