:root {
    --bg-color: #0f0f11;
    --text-main: #ffffff;
    --text-muted: #888888;
    --card-bg: #1a1a1d;
    --card-border: rgba(255, 255, 255, 0.1);
}

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

/* Theme Toggle Button Styles */
.theme-toggle-container {
    position: fixed;
    top: 2rem;
    right: 2rem;
    z-index: 100;
}

#theme-toggle {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    cursor: pointer;
    transition: color 0.3s ease;
    font-weight: 600;
    padding: 0.5rem;
}

#theme-toggle:hover {
    color: var(--text-main);
}

[data-theme="light"] {
    --bg-color: #f5f5f7;
    --text-main: #2c2c2c;
    --text-muted: #666666;
    --card-bg: #ffffff;
    --card-border: rgba(0, 0, 0, 0.1);
}

[data-theme="light"] #theme-toggle::after {
    content: 'Dark';
}

[data-theme="dark"] #theme-toggle::after {
    content: 'Light';
}

/* Default before JS injects data-theme */
#theme-toggle::after {
    content: 'Light';
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: background-color 1.5s ease;
}

header {
    text-align: center;
    margin: 4rem 0;
}

header h1 {
    font-size: 3rem;
    letter-spacing: -1px;
    margin-bottom: 0.5rem;
}

header p {
    color: var(--text-muted);
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    width: 100%;
    max-width: 1200px;
    padding: 0 2rem 4rem 2rem;
}

@keyframes slideUpFadeIn {
    0% {
        opacity: 0;
        transform: translateY(50px);
    }

    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.project-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    height: 250px;
    text-decoration: none;
    color: inherit;
    display: flex;
    align-items: flex-end;
    padding: 1.5rem;
    transition: transform 0.1s ease-out, box-shadow 0.1s ease-out;
    transform-style: preserve-3d;
    /* Crucial for the 3D effect */
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
    opacity: 0;
    /* Hidden before scrolling into view */
    transform: translateY(50px);
    /* Positioned lower before entering view */
    will-change: transform, box-shadow, opacity;
}

.project-card.visible {
    opacity: 1;
    transform: translateY(0);
    animation: slideUpFadeIn 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) backwards;
}

.card-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: 0;
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: transform;
}

.project-card:hover .card-bg {
    transform: scale(1.1);
}

/* Dark gradient to ensure text readability over images */
.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0) 40%, rgba(0, 0, 0, 0.8) 100%);
    pointer-events: none;
    z-index: 1;
}

/* Smooth transition when the mouse leaves */
.project-card.resetting {
    transition: transform 0.5s ease-out, box-shadow 0.5s ease-out;
}

.card-content {
    transform: translateZ(30px);
    /* Pushes text forward during 3D rotation */
    pointer-events: none;
    /* Prevents text from messing with hover calculations */
    position: relative;
    z-index: 2;
}

.card-content h2 {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

.card-content p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    pointer-events: none;
}

/* Admin UI Styles */
.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 1200px;
    margin: 4rem auto 2rem;
    padding: 0 2rem;
}

.admin-header h1 {
    font-size: 2.5rem;
}

.back-link {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: bold;
    transition: color 0.2s;
}

.back-link:hover {
    color: var(--text-main);
}

.admin-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    height: 250px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 1.5rem;
    position: relative;
    background-size: cover;
    background-position: center;
    overflow: hidden;
}

.admin-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0) 40%, rgba(0, 0, 0, 0.8) 100%);
    pointer-events: none;
}

.admin-card .card-content {
    position: relative;
    z-index: 1;
}

.add-card {
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border: 2px dashed var(--card-border);
    background: transparent;
    transition: border-color 0.2s, color 0.2s;
    color: var(--text-muted);
}

.add-card:hover {
    border-color: var(--text-main);
    color: var(--text-main);
}

.add-card::before {
    display: none;
}

.add-icon {
    font-size: 4rem;
    font-weight: 200;
}

.delete-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(255, 0, 0, 0.7);
    color: white;
    border: none;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    cursor: pointer;
    z-index: 10;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.delete-btn:hover {
    background: rgba(255, 0, 0, 1);
}

.visibility-btn {
    position: absolute;
    top: 1rem;
    right: 3.5rem;
    background: rgba(0, 0, 0, 0.5);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    width: 30px;
    height: 30px;
    cursor: pointer;
    z-index: 10;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.visibility-btn:hover {
    background: rgba(0, 0, 0, 0.9);
}

.admin-card.hidden-project {
    filter: grayscale(100%) brightness(0.6);
}

/* Modal Form */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
    backdrop-filter: blur(5px);
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.admin-form {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 16px;
    border: 1px solid var(--card-border);
    width: 90%;
    max-width: 500px;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    position: relative;
}

.close-modal {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.form-group input,
.form-group textarea {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
    padding: 0.8rem;
    border-radius: 8px;
    color: var(--text-main);
    font-family: inherit;
    font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #555;
}

.submit-btn {
    background: #ffffff;
    color: #000000;
    border: none;
    padding: 1rem;
    border-radius: 8px;
    font-weight: bold;
    font-size: 1rem;
    cursor: pointer;
    margin-top: 1rem;
    transition: opacity 0.2s;
}

.submit-btn:hover {
    opacity: 0.9;
}

/* Contact Page Styles */
.contact-container {
    width: 100%;
    max-width: 600px;
    padding: 0 2rem 4rem 2rem;
    margin: 0 auto;
}

body.building-up header,
body.building-up .contact-container,
body.building-up .theme-toggle-container {
    opacity: 0;
    pointer-events: none;
}

body.theme-transitioning header,
body.theme-transitioning main,
body.theme-transitioning #contact-btn,
body.theme-transitioning .admin-header {
    opacity: 0 !important;
    pointer-events: none !important;
    transition: none !important;
}

body.revealed header,
body.revealed .contact-container,
body.revealed .theme-toggle-container {
    opacity: 1;
    pointer-events: all;
    transition: opacity 0.8s ease-in;
}

.contact-form {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 16px;
    border: 1px solid var(--card-border);
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 2;
}

.contact-form .form-group input,
.contact-form .form-group textarea {
    width: 100%;
    resize: vertical;
}

.contact-submit {
    margin-top: 1rem;
}

/* Contact Me Button */
#contact-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: auto;
    height: 60px;
    cursor: pointer;
    z-index: 100;
    transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: transform;
}

#contact-btn:hover {
    transform: translateY(-10px);
}