:root {
    --bg-color: #ffffff;
    --card-bg: #ffffff;
    --card-border: #f0f0f0;
    --text-primary: #1a1a1a;
    --text-secondary: #555555;
    --accent-red: #e63946;
    --accent-red-light: #ffebec;
    --accent-red-dark: #ba1826;
    --color-black: #000000;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.hero {
    min-height: 40vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 80px 0 40px;
}

.hero-title {
    font-family: 'Outfit', sans-serif;
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--color-black);
    animation: fadeInDown 1s ease-out;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.2rem);
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
    animation: fadeInUp 1s ease-out 0.2s both;
}

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

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

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 2.5rem;
    padding: 40px 0 100px;
}

.project-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.04);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-red) 0%, var(--color-black) 100%);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.project-card:hover {
    transform: translateY(-8px);
    border-color: rgba(230, 57, 70, 0.2);
    box-shadow: 0 20px 40px rgba(230, 57, 70, 0.08);
}

.project-card:hover::before {
    transform: scaleX(1);
}

.project-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.project-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.project-tag {
    display: inline-block;
    align-self: flex-start;
    padding: 0.4rem 1rem;
    border-radius: 100px;
    background: var(--accent-red-light);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
    color: var(--accent-red);
}

.project-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    line-height: 1.2;
    color: var(--text-primary);
}

.project-desc {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.problem-statement {
    background: #fafafa;
    border-left: 4px solid var(--accent-red);
    padding: 1.2rem;
    border-radius: 0 12px 12px 0;
    margin-bottom: 1.5rem;
}

.problem-statement h4 {
    font-size: 1rem;
    color: var(--color-black);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.problem-statement p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin: 0;
}

.features-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-bottom: 1.5rem;
}

.features-list span {
    background: #ffffff;
    border: 1px solid #e0e0e0;
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
    transition: all 0.3s ease;
}

.project-card:hover .features-list span {
    border-color: var(--accent-red);
    color: var(--accent-red-dark);
    background: var(--accent-red-light);
}

.card-footer {
    margin-top: auto;
}

.btn-gradient {
    display: inline-block;
    padding: 0.8rem 1.8rem;
    background: linear-gradient(135deg, var(--accent-red) 0%, var(--color-black) 100%);
    color: #ffffff;
    text-decoration: none;
    font-weight: 600;
    border-radius: 8px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    text-align: center;
    width: 100%;
}

.btn-gradient:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(230, 57, 70, 0.3);
}

footer {
    text-align: center;
    padding: 3rem 0;
    border-top: 1px solid var(--card-border);
    color: var(--text-secondary);
    font-size: 0.9rem;
    background: #ffffff;
}

@media (max-width: 768px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .project-card {
        padding: 2rem;
    }
}