/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Vazirmatn', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

/* Loading Screen */
#loading-screen {
    transition: opacity 0.5s ease-out;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #333;
    border-top: 4px solid #00ff99;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Quick fix for loading screen */
#loading-screen {
    transition: opacity 0.5s ease-out !important;
}

/* Background Effects */
.background-animation {
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 100%);
    overflow: hidden;
}

.background-animation::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(10, 10, 10, 0.8), rgba(0, 0, 0, 0.9));
    z-index: 1;
}

.background-animation span {
    position: absolute;
    color: #00ff99;
    font-family: 'Vazirmatn', sans-serif;
    font-size: 1.5em;
    animation: fall linear infinite;
    opacity: 0.7;
}

.cyber-grid {
    background-image: 
        linear-gradient(rgba(0, 255, 153, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 255, 153, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: grid-move 20s linear infinite;
}

@keyframes fall {
    0% {
        transform: translateY(-100vh) rotate(0deg);
        opacity: 1;
    }
    20% {
        opacity: 0.8;
    }
    100% {
        transform: translateY(100vh) rotate(360deg);
        opacity: 0;
    }
}

@keyframes grid-move {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

/* Custom Animations */
@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

@keyframes glow {
    from { box-shadow: 0 0 20px rgba(0, 255, 153, 0.5); }
    to { box-shadow: 0 0 30px rgba(0, 204, 255, 0.8), 0 0 40px rgba(0, 204, 255, 0.6); }
}

@keyframes typing {
    from { width: 0; }
    to { width: 100%; }
}

@keyframes blink-caret {
    from, to { border-color: transparent; }
    50% { border-color: #00ff99; }
}

@keyframes slideUp {
    from { 
        opacity: 0; 
        transform: translateY(30px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Navigation Styles */
.nav-link {
    position: relative;
    color: #ffffff;
    text-decoration: none;
    padding: 0.5rem 1rem;
    transition: all 0.3s ease;
    border-radius: 0.5rem;
}

.nav-link::before {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    color: #00ff99;
    overflow: hidden;
    transition: width 0.3s ease;
    white-space: nowrap;
    padding: 0.5rem 1rem;
}

.nav-link:hover::before {
    width: 100%;
}

.mobile-nav-link {
    display: block;
    color: #ffffff;
    text-decoration: none;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
}

.mobile-nav-link:hover {
    background: #00ff99;
    color: #000000;
    transform: translateX(-5px);
}

.control-btn {
    width: 2.5rem;
    height: 2.5rem;
    background: rgba(0, 255, 153, 0.1);
    border: 1px solid rgba(0, 255, 153, 0.3);
    border-radius: 0.5rem;
    color: #00ff99;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.control-btn:hover {
    background: #00ff99;
    color: #000000;
    transform: scale(1.1);
    box-shadow: 0 0 20px rgba(0, 255, 153, 0.5);
}


/* Typography */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #00ff99, #00ccff);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1rem;
}

.section-subtitle {
    color: #9ca3af;
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Typing Effect */
.cursor-blink {
    animation: blink-caret 0.75s step-end infinite;
}

/* Button Styles */
.btn-primary {
    display: inline-flex;
    align-items: center;
    padding: 0.875rem 2rem;
    background: linear-gradient(135deg, #00ff99, #00ccff);
    color: #000000;
    text-decoration: none;
    border-radius: 0.75rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 255, 153, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 255, 153, 0.4);
    background: linear-gradient(135deg, #00ccff, #9945ff);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    padding: 0.875rem 2rem;
    background: rgba(0, 204, 255, 0.1);
    color: #00ccff;
    text-decoration: none;
    border: 2px solid #00ccff;
    border-radius: 0.75rem;
    font-weight: 600;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: #00ccff;
    color: #000000;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 204, 255, 0.4);
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    padding: 0.875rem 2rem;
    background: transparent;
    color: #00ff99;
    text-decoration: none;
    border: 2px solid #00ff99;
    border-radius: 0.75rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-outline:hover {
    background: #00ff99;
    color: #000000;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 255, 153, 0.4);
}

/* Card Styles */
.stat-card {
    background: rgba(26, 26, 26, 0.8);
    border: 1px solid rgba(0, 255, 153, 0.2);
    border-radius: 1rem;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: #00ff99;
    box-shadow: 0 10px 30px rgba(0, 255, 153, 0.2);
}

.about-card {
    background: rgba(26, 26, 26, 0.6);
    border: 1px solid rgba(0, 255, 153, 0.1);
    border-radius: 1rem;
    padding: 1.5rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.about-card:hover {
    border-color: rgba(0, 255, 153, 0.3);
    background: rgba(26, 26, 26, 0.8);
    transform: translateX(10px);
}

/* Skill Progress Bars */
.skill-bar {
    margin-bottom: 1.5rem;
}

.skill-progress {
    width: 100%;
    height: 8px;
    background: rgba(26, 26, 26, 0.8);
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid rgba(0, 255, 153, 0.2);
}

.skill-fill {
    height: 100%;
    background: linear-gradient(90deg, #00ff99, #00ccff);
    border-radius: 4px;
    transition: width 1s ease-in-out;
    position: relative;
}

.skill-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    animation: shimmer 2s infinite;
}

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

/* Skills Categories */
.skill-category {
    background: rgba(26, 26, 26, 0.8);
    border: 1px solid rgba(0, 255, 153, 0.1);
    border-radius: 1rem;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.skill-category:hover {
    transform: translateY(-10px);
    border-color: #00ff99;
    box-shadow: 0 15px 40px rgba(0, 255, 153, 0.2);
}


.skill-icon {
    width: 4rem;
    height: 4rem;
    background: linear-gradient(135deg, #00ff99, #00ccff);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 1.5rem;
    color: #000000;
    transition: all 0.3s ease;
}

.skill-category:hover .skill-icon {
    transform: scale(1.1) rotate(10deg);
    box-shadow: 0 0 30px rgba(0, 255, 153, 0.5);
}

.skill-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: #00ff99;
    margin-bottom: 1rem;
}

.skill-list {
    list-style: none;
    color: #9ca3af;
    text-align: right;
}

.skill-list li {
    padding: 0.25rem 0;
    position: relative;
    transition: all 0.3s ease;
}

.skill-list li:before {
    content: "▶️";
    color: #00ccff;
    margin-left: 0.5rem;
}

.skill-list li:hover {
    color: #ffffff;
    transform: translateX(-5px);
}

/* Project Cards */
.project-card {
    background: rgba(26, 26, 26, 0.8);
    border: 1px solid rgba(0, 255, 153, 0.1);
    border-radius: 1rem;
    overflow: hidden;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.project-card:hover {
    transform: translateY(-10px);
    border-color: #00ff99;
    box-shadow: 0 20px 50px rgba(0, 255, 153, 0.2);
}

.project-image {
    background: linear-gradient(135deg, rgba(0, 255, 153, 0.1), rgba(0, 204, 255, 0.1));
    padding: 3rem;
    text-align: center;
    border-bottom: 1px solid rgba(0, 255, 153, 0.1);
}

.project-content {
    padding: 1.5rem;
}

.project-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 0.75rem;
}

.project-description {
    color: #9ca3af;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tag {
    background: rgba(0, 255, 153, 0.1);
    color: #00ff99;
    border: 1px solid rgba(0, 255, 153, 0.3);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 500;
}

.project-links {
    display: flex;
    gap: 1rem;
}

.project-link {
    display: inline-flex;
    align-items: center;
    color: #00ccff;
    text-decoration: none;
    font-size: 0.875rem;
    transition: all 0.3s ease;
}

.project-link:hover {
    color: #00ff99;
    transform: translateX(-2px);
}

/* Contact Styles */
.contact-card {
    background: rgba(26, 26, 26, 0.8);
    border: 1px solid rgba(0, 255, 153, 0.1);
    border-radius: 1rem;
    padding: 2rem;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.contact-card:hover {
    border-color: rgba(0, 255, 153, 0.3);
    background: rgba(26, 26, 26, 0.9);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: #ffffff;
    text-decoration: none;
    padding: 1rem;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
}

.contact-item:hover {
    background: rgba(0, 255, 153, 0.1);
    transform: translateX(-5px);
}

.contact-icon {
    width: 3rem;
    height: 3rem;
    background: linear-gradient(135deg, #00ff99, #00ccff);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #000000;
    font-size: 1.25rem;
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    color: #ffffff;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    background: rgba(26, 26, 26, 0.8);
    border: 1px solid rgba(0, 255, 153, 0.2);
    border-radius: 0.5rem;
    color: #ffffff;
    font-family: 'Vazirmatn', sans-serif;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.form-input:focus {
    outline: none;
    border-color: #00ff99;
    box-shadow: 0 0 0 3px rgba(0, 255, 153, 0.1);
    background: rgba(26, 26, 26, 0.9);
}

.form-input::placeholder {
    color: #6b7280;
}

/* Back to Top Button */
#back-to-top {
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

#back-to-top.show {
    opacity: 1;
    pointer-events: auto;
}


#back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 255, 153, 0.4);
}

/* Responsive Design */
@media (max-width: 768px) {
    .section-title {
        font-size: 2rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
    
    .skill-category {
        padding: 1.5rem;
    }
    
    .project-image {
        padding: 2rem;
    }
    
    .contact-card {
        padding: 1.5rem;
    }
    
    .btn-primary,
    .btn-secondary,
    .btn-outline {
        padding: 0.75rem 1.5rem;
        font-size: 0.875rem;
    }
}

@media (max-width: 640px) {
    .background-animation span {
        font-size: 1rem;
    }
    
    .stat-card {
        padding: 1rem;
    }
    
    .about-card {
        padding: 1rem;
    }
    
    .project-content {
        padding: 1rem;
    }
}

/* Notes Page Styles */
.filter-btn {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background: rgba(26, 26, 26, 0.8);
    border: 1px solid rgba(0, 255, 153, 0.2);
    border-radius: 2rem;
    color: #9ca3af;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    cursor: pointer;
    backdrop-filter: blur(10px);
}

.filter-btn:hover,
.filter-btn.active {
    background: #00ff99;
    color: #000000;
    border-color: #00ff99;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 255, 153, 0.3);
}

.note-card {
    background: rgba(26, 26, 26, 0.8);
    border: 1px solid rgba(0, 255, 153, 0.1);
    border-radius: 1rem;
    overflow: hidden;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.note-card:hover {
    transform: translateY(-10px);
    border-color: #00ff99;
    box-shadow: 0 20px 50px rgba(0, 255, 153, 0.2);
}

.note-card.coming-soon {
    opacity: 0.7;
    border-color: rgba(153, 69, 255, 0.2);
}

.note-card.coming-soon:hover {
    border-color: #9945ff;
    box-shadow: 0 20px 50px rgba(153, 69, 255, 0.2);
}

.note-header {
    padding: 1.5rem 1.5rem 0;
    display: flex;
    justify-content: between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.note-category {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(0, 255, 153, 0.1);
    color: #00ff99;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 500;
}

.note-date {
    color: #6b7280;
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.note-content {
    padding: 1.5rem;
    flex-grow: 1;
}

.note-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.note-excerpt {
    color: #9ca3af;
    line-height: 1.6;
    margin-bottom: 1rem;
    font-size: 0.875rem;
}

.note-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.note-footer {
    padding: 0 1.5rem 1.5rem;
    display: flex;
    justify-content: between;
    align-items: center;
    gap: 1rem;
}

.note-link {
    display: inline-flex;
    align-items: center;
    color: #00ccff;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
    transition: all 0.3s ease;
}

.note-link:hover {
    color: #00ff99;
    transform: translateX(-3px);
}

.note-link.disabled {
    color: #6b7280;
    cursor: not-allowed;
}

.note-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.reading-time {
    color: #6b7280;
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* Newsletter Styles */
.newsletter-form {
    display: flex;
    gap: 1rem;
    max-width: 400px;
    margin: 0 auto;
}

/* Animation for filtered items */
.note-card.filtered-out {
    opacity: 0;
    transform: scale(0.8);
    pointer-events: none;
}

.note-card.filtered-in {
    opacity: 1;
    transform: scale(1);
    pointer-events: auto;
}

/* Active nav link */
.nav-link.active {
    color: #00ff99;
}


.nav-link.active::before {
    width: 100%;
}

/* Responsive adjustments for notes */
@media (max-width: 768px) {
    .note-header {
        padding: 1rem 1rem 0;
        flex-direction: column;
        align-items: flex-start;
    }
    
    .note-content {
        padding: 1rem;
    }
    
    .note-footer {
        padding: 0 1rem 1rem;
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .filter-btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
}

@media (max-width: 640px) {
    .note-title {
        font-size: 1.125rem;
    }
    
    .note-excerpt {
        font-size: 0.8rem;
    }
}