/* :root {
  --color-primary: #00827e;
  --color-primary-2: #269d84;
  --color-primary-3: #52b783;
  --color-primary-4: #84cf7d;
  --color-secondary: #f9f871; 
  --color-secondary-2: #bbe575; 
  --color-tertiary: #0984e3;
  --color-accent: #fff900;

  --color-primary: #012425;
  --color-primary-light: #004d49;
  --color-primary-dark: #001a1b;
} */

:root {
  /* Primary Colors */
  --color-primary: #00827e;
  --color-primary-light: #44B9B4;
  --color-primary-dark: #006C68;


  /* Secondary Colors */
  --color-secondary: #00b894;
  /* Teal */
  --color-secondary-light: #00cec9;
  /* Light Teal */
  --color-secondary-dark: #009688;
  /* Dark Teal */

  /* Tertiary Colors */
  --color-tertiary: #0984e3;
  /* Blue */
  --color-tertiary-light: #74b9ff;
  /* Light Blue */
  --color-tertiary-dark: #0064d2;
  /* Dark Blue */

  /* Accent colors */
  --color-accent: #fff900;
  --color-accent-light: #ffff33;
  --color-accent-dark: #e6e000;

  /* Spacing Scale */
  --space-0: 0;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
  --space-40: 10rem;
  --space-48: 12rem;
  --space-56: 14rem;
  --space-64: 16rem;

  /* Additional Accent Colors */
  --color-success: #10b981;
  --color-success-light: #34d399;
  --color-success-dark: #059669;
  --color-warning: #f59e0b;
  --color-warning-light: #fbbf24;
  --color-warning-dark: #d97706;
  --color-error: #ef4444;
  --color-error-light: #f87171;
  --color-error-dark: #dc2626;
  --color-info: #3b82f6;
  --color-info-light: #60a5fa;
  --color-info-dark: #2563eb;

  /* Background Colors */
  --color-bg: #ffffff;
  --color-bg-dark: #012425;
  --color-bg-secondary: #f8fafc;
  --color-bg-tertiary: #f1f5f9;

  /* Text Colors */
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-muted: #94a3b8;
  --color-text-inverse: #ffffff;

  /* Border Colors */
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;
  --color-border-dark: #cbd5e1;


  /* 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), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-primary: 0 4px 14px 0 rgba(1, 36, 37, 0.15);
  --shadow-secondary: 0 4px 14px 0 rgba(0, 183, 148, 0.25);
  --shadow-accent: 0 4px 14px 0 rgba(255, 249, 0, 0.25);

  /* Typography */
  --font-family-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-family-body: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-family-mono: 'Roboto Mono', 'Fira Code', 'Consolas', monospace;


  /* Font Sizes - Fluid Typography */
  --font-size-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --font-size-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
  --font-size-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
  --font-size-lg: clamp(1.125rem, 1rem + 0.625vw, 1.25rem);
  --font-size-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --font-size-2xl: clamp(1.5rem, 1.3rem + 1vw, 2rem);
  --font-size-3xl: clamp(1.875rem, 1.6rem + 1.375vw, 2.5rem);
  --font-size-4xl: clamp(2.25rem, 1.9rem + 1.75vw, 3rem);
  --font-size-5xl: clamp(2.75rem, 2.3rem + 2.25vw, 3.75rem);


  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  --line-height-loose: 2;

  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-3xl: 1.5rem;
  --radius-full: 9999px;

  /* Z-Index Scale */
  --z-dropdown: 1000;
  --z-sticky-backdrop: 1020;
  --z-sticky: 1025;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-toast: 1080;
  /* --z-header: 9999;
  --z-header-drop: 99999; */

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 300ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 5px;
}

::-webkit-scrollbar-track {
  background: var(--color-primary);
  /* border-radius: 10px; */
}

::-webkit-scrollbar-thumb {
  background: var(--color-accent);
  /* border-radius: 10px; */
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-accent-dark);
}

body {
  font-size: var(--font-size-base);
  font-family: var(--font-family-body);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-base), color var(--transition-base);
  overflow-x: hidden;
  /* filter: grayscale(100%); */
}

/* Stop body from overflowing when modal is active */
body:has(> .modal.show) {
  overflow: hidden;
}

/* Animations */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

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

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }

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

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }

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

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-primary-dark);
}

h1 {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.025em;
}

h2 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.025em;
}

h3 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-semibold);
  letter-spacing: -0.025em;
}

h4 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
}

h5 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-medium);
}

h6 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  outline: 2px solid transparent;
  outline-offset: 2px;
  white-space: nowrap;
  user-select: none;
  position: relative;
  overflow: hidden;
}

.btn:focus-visible {
  outline-color: var(--color-primary);
  outline-offset: 2px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Button Sizes */
.btn-xs {
  padding: var(--space-1) var(--space-2);
  font-size: var(--font-size-xs);
  min-height: 1rem;
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  min-height: 2rem;
}

.btn-md {
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-base);
  min-height: 2.5rem;
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-lg);
  min-height: 3rem;
}

/* Button Variants */
.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
  color: var(--color-text-inverse);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: var(--color-secondary);
  color: var(--color-text-inverse);
  border-color: var(--color-secondary);
  box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
  background-color: var(--color-secondary-dark);
  border-color: var(--color-secondary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-accent {
  background-color: var(--color-accent);
  color: var(--color-bg-dark);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-accent);
  font-weight: var(--font-weight-semibold);
}

.btn-accent:hover {
  background-color: var(--color-accent-light);
  border-color: var(--color-accent-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-text);
  border-color: transparent;
}

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

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

.btn-success:hover {
  background-color: var(--color-success-light);
  border-color: var(--color-success-light);
}

.btn-warning {
  background-color: var(--color-warning);
  color: white;
  border-color: var(--color-warning);
}

.btn-warning:hover {
  background-color: var(--color-warning-light);
  border-color: var(--color-warning-light);
}

.btn-error {
  background-color: var(--color-error);
  color: white;
  border-color: var(--color-error);
}

.btn-error:hover {
  background-color: var(--color-error-light);
  border-color: var(--color-error-light);
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-8);
  position: relative;
}

@media (max-width: 800px) {
  .container {
    padding: 0 var(--space-6);
  }
}

@media (max-width: 500px) {
  .container {
    padding: 0 var(--space-4);
  }
}

p {
  line-height: var(--line-height-relaxed);
  color: var(--color-text);
  font-size: var(--font-size-base);
  font-family: var(--font-family-body);
}

/* Links */
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: all var(--transition-fast);
  /* border-radius: var(--radius-sm); */
  outline: 2px solid transparent;
  outline-offset: 2px;
}

/* a:hover {
  color: var(--color-primary-light);
  text-decoration: underline;
} */

a:focus-visible {
  outline-color: var(--color-primary);
  outline-offset: 2px;
}

/* Lists */
ul,
ol {
  list-style: none;
}

/* ==================
  Utility Classes
===================== */
.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* Section hero headings */
/* Header */
.hero-header {
  background: linear-gradient(135deg,
      var(--color-primary-dark) 0%,
      var(--color-primary) 100%);
  color: var(--color-text-inverse);
  padding: var(--space-12) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.3)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.hero-header-content {
  position: relative;
  z-index: 1;
}

.hero-header .hero-header-title {
  margin-bottom: var(--space-4);
  background: linear-gradient(135deg,
      var(--color-accent) 0%,
      var(--color-accent-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  max-width: 70ch;
}

.hero-header .hero-header-subtitle {
  /* animation: slideInUp 1s ease-out 0.2s both; */
  color: var(--color-text-inverse);
  /* White for tagline */
  font-family: var(--font-family-body);
  /* font-size: var(--font-size-2xl); */
  /* font-weight: var(--font-weight-semibold); */
  margin-bottom: var(--space-6);
}

.hero-header .hero-header-desc {
  color: var(--color-text-inverse);
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
  max-width: 60ch;
  margin: 0 auto;
}


/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  z-index: var(--z-modal-backdrop);
  inset: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(5px);
}

.modal.show {
  display: block;
}

.modal-content {
  z-index: var(--z-modal);
  background: var(--color-bg);
  margin: 5vh auto;
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  animation: modalSlideIn var(--transition-slow);
}

.modal-content::-webkit-scrollbar {
  display: none;
  width: 0;
}

.modal .close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  background: none;
  border: none;
  font-size: var(--font-size-xl);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.modal .close:hover {
  color: var(--color-text);
}

.modal-title {
  color: var(--color-text);
  font-family: var(--font-family-heading);
  /* font-size: var(--font-size-3xl);  */
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-4);
  text-align: center;
  padding-bottom: var(--space-4);
  border-bottom: 2px solid var(--color-border);
}


@media (max-width: 500px) {
  .modal-content {
    width: 90%;
    /* padding: var(--space-6); */
  }

  .modal-title {
    font-size: var(--font-size-lg);
    padding-bottom: var(--space-3);
  }
}

@media (max-width: 350px) {
  .modal-content {
    padding: var(--space-4);
  }

  .modal .close {
    top: var(--space-2);
    right: var(--space-2);
  }
}

.modal .course-outline {
  .progress-summary {
    background-color: var(--color-bg-secondary);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-8);
    text-align: center;
    width: 100%;
  }

  .progress-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2);
  }

  .progress-bar {
    width: 100%;
    height: var(--space-2);
    background-color: var(--color-border);
    border-radius: var(--radius-full);
    overflow: hidden;
  }

  .progress-fill {
    height: 100%;
    background: linear-gradient(90deg,
        var(--color-primary),
        var(--color-success));
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
  }

  .timeline {
    position: relative;
    padding-left: var(--space-8);
    /* background-color: red; */
  }

  .timeline::before {
    content: "";
    position: absolute;
    left: var(--space-3);
    /* left: 0; */
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--color-border);
  }

  .timeline-item {
    position: relative;
    margin-bottom: var(--space-8);
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    /* background-color: green; */
  }

  .timeline-item:last-child {
    margin-bottom: 0;
  }

  .timeline-checkpoint {
    position: absolute;
    left: calc(-1 * var(--space-8));
    width: var(--space-6);
    height: var(--space-6);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-full);
    background-color: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
    transition: all var(--transition-base);
  }

  .timeline-checkpoint.completed {
    border-color: var(--color-success);
    background-color: var(--color-success);
  }

  .timeline-checkpoint.pending {
    border-color: var(--color-border-dark);
    background-color: var(--color-bg);
  }

  .checkmark {
    width: 12px;
    height: 12px;
    stroke: var(--color-text-inverse);
    stroke-width: 2;
    fill: none;
    opacity: 0;
    transition: opacity var(--transition-base);
  }

  .checkmark.completed {
    opacity: 1;
  }

  .checkmark.pending {
    opacity: 0.3;
    stroke: var(--color-text-muted);
  }

  .timeline-content {
    flex: 1;
    padding: var(--space-4) var(--space-6);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    overflow: hidden;
    position: relative;
  }

  .timeline-content:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
  }

  .timeline-content.completed {
    background-color: var(--color-bg-secondary);
    border-color: var(--color-success-light);
  }

  .topic-title {
    /* font-size: var(--font-size-base); */
    /* font-weight: var(--font-weight-semibold); */
    color: var(--color-text);
  }

  .topic-title.completed {
    color: var(--color-success-dark);
  }

  .topic-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    margin: var(--space-2) 0;
  }

  .timeline-content .sub-topics {
    margin-top: var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    transform: translateX(0);
    opacity: 0;
    position: absolute;
    width: calc(100% - 50px);
    transition: transform var(--transition-slow), opacity var(--transition-slow);
  }

  .timeline-content.sub-topic-active .sub-topics {
    transform: translateX(50px);
    opacity: 1;
    position: static;
  }

  .timeline-content .topic-icon {
    i {
      transition: transform var(--transition-slow);
      font-size: var(--font-size-xs);
      /* transform: rotate(90deg); */
    }

    &.active i {
      transform: rotate(90deg);
    }
  }

  .sub-topics .sub-topic {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--space-2);

    p {
      color: var(--color-text-secondary);
      font-size: var(--font-size-sm);
      font-weight: var(--font-weight-semibold);
    }

    .timeline-checkpoint {
      position: static;
      /* left: calc(-1 * var(--space-8) + var(--space-2)); */
      width: var(--space-4);
      height: var(--space-4);
      flex-shrink: 0;
    }

    .checkmark {
      width: 10px;
      height: 10px;
    }
  }

  @media (max-width: 800px) {
    .timeline-content.sub-topic-active .sub-topics {
      transform: translateX(20px);
      width: calc(100% - 30px);
    }
  }

  @media (max-width: 500px) {
    .timeline {
      padding-left: var(--space-6);
    }

    .timeline::before {
      left: var(--space-1);
    }

    .timeline-content {
      /* max-height: 170px; */
      padding: var(--space-2) var(--space-4);
    }

    .topic-description {
      font-size: var(--font-size-xs);
    }

    .timeline-content.sub-topic-active .sub-topics {
      transform: translateX(0);
    }
  }
}


.modal .assignment-modal-body {
  .instructions {
    background: var(--color-bg-tertiary);
    padding: var(--space-6);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-8);

    p {
      font-size: var(--font-size-xs);
    }

    /* border-left: 4px solid var(--primary-color); */
  }

  .instructions h3 {
    /* color: var(--primary-color); */
    margin-bottom: var(--space-3);
  }

  @media (max-width: 500px) {
    .instructions {
      padding: var(--space-4);
    }

    /* .instructions h3 {
      font-size: var(--font-size-sm);
      margin-bottom: var(--space-2);
    } */

  }

  .submission-tabs {
    display: flex;
    border-bottom: 2px solid var(--color-border);
    margin-bottom: var(--space-6);
    gap: var(--space-1);
  }

  .tab-btn {
    padding: var(--space-3) var(--space-6);
    background: none;
    border: none;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease;
  }

  .tab-btn.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
  }

  .assignment-tab-content {
    display: none;
    margin-bottom: var(--space-6);
  }

  .assignment-tab-content.active {
    display: block;
  }

  .file-upload {
    border: 3px dashed var(--color-border);
    border-radius: 10px;
    padding: var(--space-12) var(--space-6);
    text-align: center;
    background: var(--color-bg-tertiary);
    transition: all 0.3s ease;
    cursor: pointer;
  }

  .file-upload:hover,
  .file-upload.dragover {
    border-color: var(--color-primary);
    background: rgba(0, 130, 126, 0.05);
  }

  .file-upload-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: var(--space-4);
  }

  .file-list {
    margin-top: var(--space-4);
  }

  .file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-2);
    border: 1px solid var(--color-border);
  }

  .remove-file {
    background: var(--color-error);
    color: var(--color-bg);
    border: none;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--font-size-sm);
  }

  .code-editor {
    background: var(--color-bg-dark);
    /* border-radius: var(--radius-2xl); */
    overflow: hidden;
  }

  .editor-header {
    background: #1a202c;
    padding: var(--space-2) var(--space-3);

    /* display: flex;
    justify-content: space-between;
    align-items: center; */
    h5 {
      color: var(--color-text-inverse);
    }
  }

  /* .language-select {
    background: #2d3748;
    color: white;
    border: 1px solid #4a5568;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-md);
  } */

  .code-textarea {
    width: 100%;
    min-height: 300px;
    background: transparent;
    border: none;
    color: var(--color-text-inverse);
    padding: var(--space-6);
    font-family: 'Courier New', monospace;
    font-size: var(--font-size-sm);
    resize: vertical;
    outline: none;

    &::-webkit-scrollbar {
      display: none;
    }
  }

  .form-group {
    margin-bottom: var(--space-6);
  }

  .form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--radius-md);
    color: var(--color-text);
  }

  .form-group input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    transition: border-color 0.3s ease;
  }

  .form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 130, 126, 0.1);
  }

  .github-links {
    display: flex;
    gap: var(--space-3);
    margin-top: var(--space-3);
    flex-wrap: wrap;
  }

  /* .github-btn {
    background: #333;
    color: white;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-size: var(--font-size-xs);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    transition: background 0.3s ease;
  }

  .github-btn:hover {
    background: #555;
  } */

  .submit-btn {
    /* background: var(--color-accent);
    color: var(--color-text);
    border: none;
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px; */
    width: 100%;
  }

  /* .submit-btn:hover {
    background: var(--color-accent-dark);
    transform: translateY(-2px);
  } */

  .success-message {
    background: var(--color-success);
    color: white;
    padding: var(--space-4) var(--space-6);
    border-radius: var(--radius-md);
    margin-top: var(--space-4);
    text-align: center;
    font-weight: 600;
    display: none;
  }

  @keyframes pulse {

    0%,
    100% {
      opacity: 1;
    }

    50% {
      opacity: 0.7;
    }
  }

  @media (max-width: 768px) {
    .filters {
      flex-direction: column;
      align-items: stretch;
    }

    .filter-group {
      flex-direction: column;
      align-items: stretch;
    }

    .assignment-header {
      flex-direction: column;
      align-items: flex-start;
    }

    .assignment-meta {
      grid-template-columns: 1fr;
    }

    .modal-content {
      width: 95%;
      margin: 5% auto;
    }

    .modal-body {
      padding: var(--space-6);
    }

    .submission-tabs {
      flex-direction: column;
    }

    .tab-btn {
      text-align: left;
      border-bottom: 1px solid var(--border-color);
      border-left: 3px solid transparent;
    }

    .tab-btn.active {
      border-left-color: var(--primary-color);
      border-bottom-color: var(--border-color);
    }

    .github-links {
      flex-direction: column;
    }

    .file-upload {
      padding: var(--space-8) var(--space-4);
    }
  }
}


/* Notification modal Styles */
.modal .modal-body-sub-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 2px solid var(--color-border);

  .modal-title {
    padding-bottom: 0;
    border: none;
  }
}

.modal .modal-body-sub-header .notification-meta {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  display: flex;
  gap: var(--space-2);
}


/* Calendar modal Styles */
.modal .calendar-modal-body {
  display: grid;
  gap: var(--space-4);
  width: 100%;
}

.modal .calendar-modal-body .detail-row {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: var(--space-4);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
  width: 100%;

  .detail-label {
    font-weight: var(--font-weight-bold);
    color: var(--color-text-secondary);
  }

  .event-type-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--white);
  }

  .badge-assignment {
    background: var(--color-info);
  }

  .badge-live-class {
    background: var(--color-success);
  }

  .badge-quiz {
    background: var(--color-warning);
  }

  .badge-holiday {
    background: var(--color-error);
  }

  /* .detail-value a {
    color: var(--color-primary);
  } */

}

@media (max-width: 500px) {
  .modal .calendar-modal-body .detail-row {
    grid-template-columns: 70px 1fr;

    .detail-label {
      font-size: var(--font-size-sm);
    }

    .detail-value {
      /* max-width: calc(100% - 120px); */
      font-size: var(--font-size-xs);
    }

    .detail-value a {
      word-break: break-all;
    }
  }
}


/* Student Profile Modal Styles */
.modal {

  /* Profile Header */
  .profile-header {
    text-align: center;
    margin-bottom: var(--space-6);
    /* padding: var(--space-6) var(--space-6) var(--space-4); */
  }

  .profile-image {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 3px solid var(--color-primary-light);
    margin-bottom: var(--space-4);
  }

  .profile-name {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    margin-bottom: var(--space-2);
  }

  .profile-course {
    background: var(--color-primary);
    color: var(--color-text-inverse);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    display: inline-block;
  }

  /* Profile Body */
  /* .profile-body {
    padding: 0 var(--space-6) var(--space-6);
  } */

  .profile-section {
    margin-bottom: var(--space-5);
  }

  .profile-section:last-child {
    margin-bottom: 0;
  }

  .section-title {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    text-align: left;
  }

  .profile-bio {
    font-size: var(--font-size-sm);
    color: var(--color-text);
    line-height: var(--line-height-relaxed);
  }

  .profile-email {
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
  }

  .profile-email:hover {
    text-decoration: underline;
  }

  /* Social Links */
  .social-links {
    display: flex;
    gap: var(--space-3);
    justify-content: flex-start;
  }

  .social-link {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all var(--transition-fast);
    font-size: 18px;
  }

  .social-link.whatsapp {
    background: #25D366;
    color: white;
  }

  .social-link.linkedin {
    background: #0A66C2;
    color: white;
  }

  .social-link.github {
    background: #333;
    color: white;
  }

  .social-link.phone {
    background: var(--color-tertiary);
    color: white;
  }

  .social-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
  }
}