* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

html {
    --bg: #ffffff;
    --bg-secondary: #f8fafc;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary: #64748b;
    --accent: #0ea5e9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --card-bg: #ffffff;
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    scroll-behavior: smooth;
}

html[data-theme="dark"] {
    --bg: #1a1a2e;
    --bg-secondary: #16213e;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --secondary: #94a3b8;
    --accent: #06b6d4;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border: #2e3a59;
    --card-bg: #1f2a48;
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.3), 0 1px 2px -1px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.3), 0 4px 6px -4px rgb(0 0 0 / 0.3);
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--bg);
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 16px;
    transition: background-color 0.3s ease, color 0.3s ease;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

/* Theme Toggle Button */
.icon {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1000;
}

#toggle-mode-btn {
    border: 1px solid var(--border);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    padding: 0;
    width: 44px;
    height: 44px;
    background-color: var(--card-bg);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
    overflow: visible;
}

#toggle-mode-btn i {
    font-size: 1.5rem;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

/* Day Mode Hover */
html[data-theme="light"] #toggle-mode-btn:hover {
    background-color: var(--bg-secondary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

/* Night Mode Glow */
html[data-theme="dark"] #toggle-mode-btn {
    background-color: var(--bg-secondary);
    border-color: #fbbf24;
    box-shadow: 0 0 15px rgba(251, 191, 36, 0.5), inset 0 0 10px rgba(251, 191, 36, 0.2);
}

html[data-theme="dark"] #toggle-mode-btn i {
    color: #fbbf24; /* Amber color for light */
    text-shadow: 0 0 10px rgba(251, 191, 36, 0.8);
}

/* Shake Animation */
@keyframes shake {
    0% { transform: rotate(0deg); }
    25% { transform: rotate(15deg); }
    50% { transform: rotate(-15deg); }
    75% { transform: rotate(10deg); }
    100% { transform: rotate(0deg); }
}

.shake {
    animation: shake 0.5s ease-in-out;
}

/* Projects Section */
#projects {
    margin: 5rem 0;
    padding: 0 1rem;
}

.projects-heading {
    margin-top: 20px;
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.projects-heading>p:first-child {
    color: var(--primary);
    font-weight: 500;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.projects-heading h3 {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-primary);
    margin: 0.5rem 0 1rem 0;
    letter-spacing: -0.025em;
}

.projects-heading h3 span {
    color: var(--primary);
}

.tagline {
    color: var(--text-muted);
    font-size: 1.125rem;
    margin: 0 0 2rem 0;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.btn-container {
    margin-top: 2rem;
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.source-code-btn,
.contribute-btn {
    background-color: var(--primary);
    font-weight: 500;
    border-radius: 6px;
    color: white;
    padding: 0.75rem 1.5rem;
    display: inline-block;
    transition: all 0.2s ease;
    border: 1px solid var(--primary);
    font-size: 0.875rem;
    text-decoration: none;
}

.source-code-btn:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
}

.contribute-btn {
    background-color: transparent;
    border: 1px solid var(--border);
    color: var(--text-primary);
}

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

/* Category Filter */
.category-filter {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 2rem 0 3rem 0;
    flex-wrap: wrap;
}

.filter-btn {
    background: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 0.5rem 1.25rem;
    border-radius: 2rem;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s ease;
    box-shadow: var(--shadow);
}

.filter-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-1px);
}

.filter-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
}

/* Projects Grid */
.projects-container {
    max-width: 1200px;
    display: grid;
    margin: 4rem auto;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    grid-gap: 1.5rem;
    padding: 1rem;
}

.card {
  display: flex;
  flex-direction: column;
  border-radius: 12px;
  overflow: hidden;
  background: #ffffff;
  text-decoration: none;
}

/* FIX HEIGHT ISSUE */
.card-cover {
  height: 140px;                 /* 🔑 key fix */
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Icon size */
.card-cover i {
  font-size: 36px;
}

/* Content spacing */
.card-content {
  padding: 20px;
}

.card-content h3 {
  margin-bottom: 8px;
}


.card {
    background: var(--card-bg);
    border-radius: 20px;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background-color 0.3s ease;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.card-cover {
    height: 9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--primary);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    transition: background-color 0.3s ease;
}

.card-cover i {
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.card:hover .card-cover i {
    transform: scale(1.15) rotate(5deg);
}

/* Subtle color variations for each card */
.calculator-cover {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    color: #2563eb;
}

.tictactoe-cover {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    color: #0ea5e9;
}

.todo-cover {
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
    color: #16a34a;
}

.counter-cover {
    background: linear-gradient(135deg, #fefce8 0%, #fef3c7 100%);
    color: #d97706;
}

.quiz-cover {
    background: linear-gradient(135deg, #fdf4ff 0%, #fae8ff 100%);
    color: #a855f7;
}

.unit-cover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #ffffff;
}

.clock-cover {
    background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
    color: #dc2626;
}

.runner-cover {
    background: linear-gradient(135deg, #ecfeff 0%, #f0fdf4 100%);
    color: #0891b2;
}

.password-cover {
    background: linear-gradient(135deg, #f5f3ff 0%, #ddd6fe 100%);
    color: #7c3aed;
}

.quote-cover {
    background: linear-gradient(135deg, #fff7ed 0%, #fed7aa 100%);
    color: #ea580c;
}

.password-gen-cover {
    background: linear-gradient(135deg, #ecfdf5 0%, #a7f3d0 100%);
    color: #059669;
}
.educonnect-cover {
   background: linear-gradient(135deg, #c7a9e9 0%, #a1c4fd 100%);
}

.card-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card-header-flex {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
    gap: 0.5rem;
}
.password-cover {
    background: linear-gradient(135deg, #e0f2fe, #bae6fd);
    color: #0284c7;
}

.card-heading {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.125rem;
    margin-bottom: 0;
    letter-spacing: -0.01em;
    line-height: 1.3;
}

.category-tag {
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    border-radius: 12px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    white-space: nowrap;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-description {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 1rem;
    line-height: 1.5;
}

.card-tech {
    display: flex;
    gap: 0.375rem;
    flex-wrap: wrap;
}

.card-tech span {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
    border: 1px solid var(--border);
}

/* Contribute Section */
.contribute-section {
    max-width: 1200px;
    margin: 6rem auto;
    padding: 4rem 2rem;
    text-align: center;
    background: var(--card-bg);
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.contribute-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
}

.contribute-section h3 {
    font-size: 2.5rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
    margin: 4rem 0;
    text-align: left;
}

.step-card {
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: 16px;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
}

.step-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
    background: var(--card-bg);
}

.step-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: white;
    font-size: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.step-card h4 {
    color: var(--text-primary);
    font-size: 1.25rem;
    margin: 0 0 0.5rem 0;
    font-weight: 600;
}

.step-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    line-height: 1.6;
    flex-grow: 1;
}

.terminal-window {
    background: #1e293b; /* Always dark for terminal */
    border-radius: 8px;
    padding: 0.75rem 1rem;
    position: relative;
    margin-top: auto;
    border: 1px solid #334155;
    box-shadow: inset 0 2px 4px 0 rgba(0, 0, 0, 0.2);
}

.terminal-window::before {
    content: ''; /* Terminal dots */
    display: block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #ef4444; /* red */
    box-shadow: 12px 0 0 #fbbf24, 24px 0 0 #22c55e; /* yellow, green */
    margin-bottom: 10px;
}

.terminal-window code {
    font-family: 'Fira Code', 'Roboto Mono', monospace;
    color: #e2e8f0;
    font-size: 0.8rem;
    display: block;
    word-break: break-all;
    white-space: pre-wrap;
}

.terminal-window code::before {
    content: '$ ';
    color: #10b981;
    user-select: none;
}



/* Scroll to Top Button */
#scrollToTopBtn {
    display: none;
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 99;
    border: 1px solid var(--border);
    outline: none;
    background-color: var(--card-bg);
    color: var(--text-primary);
    padding: 12px;
    border-radius: 6px;
    cursor: pointer;
    opacity: 0;
    transition: all 0.2s ease;
    box-shadow: var(--shadow);
}

#scrollToTopBtn i {
    font-size: 20px;
}

#scrollToTopBtn:hover {
    background-color: var(--bg-secondary);
    box-shadow: var(--shadow-lg);
}

#scrollToTopBtn.show {
    display: block;
    opacity: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
    .projects-heading h3 {
        font-size: 2rem;
    }

    .projects-container {
        grid-template-columns: 1fr;
    }

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

    .btn-container {
        flex-direction: column;
        align-items: center;
    }

    .source-code-btn,
    .contribute-btn {
        width: 100%;
        max-width: 300px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    #projects {
        margin: 3rem 0;
    }

    .projects-heading h3 {
        font-size: 1.8rem;
    }

    .card-cover {
        height: 8rem;
        font-size: 3rem;
    }

    .contribute-section {
        padding: 2rem 1rem;
    }

    .contribute-section h3 {
        font-size: 1.8rem;
    }

    
}
/* Pagination */
.pagination-container {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin: 2rem 0 4rem 0;
    flex-wrap: wrap;
}

.pagination-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
    box-shadow: var(--shadow);
}

.pagination-btn:hover:not(:disabled) {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.pagination-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--bg-secondary);
}

@media (max-width: 480px) {
    .pagination-btn {
        width: 35px;
        height: 35px;
        font-size: 0.9rem;
    }
}
/* Search Bar Styling */
.search-container {
    display: flex;
    justify-content: center;
    margin: 20px 0 30px;
}

#project-search {
    width: 320px;
    max-width: 90%;
    padding: 10px 14px;
    font-family: 'Poppins', sans-serif;
    font-size: 14px;
    border-radius: 8px;
    border: 1px solid #ddd;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

#project-search:focus {
    border-color: #3b82f6;
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.15);
}

/* ============================= */
/*           NAVBAR              */
/* ============================= */

.navbar {
    position: sticky;
    top: 0;
    width: 100%;
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    z-index: 999;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.85rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo */
.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.02em;
    transition: color 0.2s ease, transform 0.2s ease;
}

.nav-logo:hover {
    transform: translateY(-1px);
    color: var(--primary-hover);
}

/* Navigation links */
.nav-links {
    display: flex;
    align-items: center;
    gap: 1.75rem;
}

.nav-links a {
    position: relative;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    padding: 0.25rem 0;
    transition: color 0.2s ease;
}

/* underline animation */
.nav-links a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 0%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transition: width 0.25s ease;
    border-radius: 2px;
}

.nav-links a:hover {
    color: var(--primary);
}

.nav-links a:hover::after {
    width: 100%;
}

/* Hamburger toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.8rem;
    cursor: pointer;
    padding: 0.25rem;
    transition: transform 0.2s ease;
}

.nav-toggle:hover {
    transform: scale(1.1);
}

/* ============================= */
/*        MOBILE NAVBAR          */
/* ============================= */

@media (max-width: 768px) {
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--card-bg);
        border-top: 1px solid var(--border);
        box-shadow: var(--shadow-lg);
        display: none;
        flex-direction: column;
        padding: 1rem 1.25rem;
        animation: slideDown 0.25s ease forwards;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        width: 100%;
        padding: 0.75rem 0;
        font-size: 1rem;
    }

    .nav-links a::after {
        display: none;
    }

    .nav-toggle {
        display: block;
    }
}

/* Slide animation */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================= */
/*            FOOTER             */
/* ============================= */

.footer {
    margin-top: 5rem;
    background-color: var(--card-bg);
    border-top: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2.5rem 1.25rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    text-align: center;
}

/* Footer text */
.footer p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* Footer links */
.footer-links {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    transition: color 0.2s ease;
}

/* footer hover underline */
.footer-links a::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: -3px;
    width: 0%;
    height: 2px;
    background: var(--primary);
    transition: all 0.25s ease;
    transform: translateX(-50%);
}

.footer-links a:hover {
    color: var(--primary);
}

.footer-links a:hover::after {
    width: 100%;
}

/* ============================= */
/*       FOOTER RESPONSIVE       */
/* ============================= */

@media (max-width: 480px) {
    .footer-container {
        padding: 2rem 1rem;
    }

    .footer-links {
        gap: 1rem;
    }

    .footer p {
        font-size: 0.85rem;
    }
}