/* Technical Elegance Design System */

:root {
    --navy: #0a1628;
    --navy-light: #1a2744;
    --cyan: #00d9ff;
    --cyan-dark: #0099cc;
    --warm-white: #f5f1e8;
    --gray: #8892a6;
}

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

body {
    font-family: 'Crimson Pro', serif;
    background: var(--warm-white);
    color: var(--navy);
    line-height: 1.7;
    overflow-x: hidden;
}

.mono {
    font-family: 'JetBrains Mono', monospace;
}

/* Header */
.site-header {
    background: var(--navy);
    color: var(--warm-white);
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.site-header::before {
    content: '';
    position: absolute;
    top: 0;
    right: -10%;
    width: 50%;
    height: 100%;
    background: linear-gradient(135deg, var(--cyan) 0%, transparent 70%);
    opacity: 0.03;
    transform: skewX(-12deg);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.back-link {
    display: inline-block;
    color: var(--cyan);
    text-decoration: none;
    font-size: 0.9rem;
    margin-bottom: 1rem;
    transition: transform 0.3s;
}

.back-link:hover {
    transform: translateX(-4px);
}

.page-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.page-subtitle {
    color: var(--gray);
    font-size: clamp(1rem, 2vw, 1.3rem);
}

/* Buttons */
.btn {
    padding: 1rem 2.5rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    display: inline-block;
}

.btn-primary {
    background: var(--cyan);
    color: var(--navy);
    clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.3), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.btn-primary:hover::before {
    opacity: 1;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 217, 255, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--navy);
    border: 2px solid var(--navy);
    clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
}

.btn-secondary:hover {
    background: var(--navy);
    color: var(--warm-white);
    transform: translateY(-2px);
}

/* Cards */
.card {
    background: white;
    padding: 2rem;
    position: relative;
    clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
    border-left: 3px solid var(--navy);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 60px;
    height: 60px;
    background: var(--cyan);
    opacity: 0.05;
    clip-path: polygon(100% 0, 100% 100%, 0 0);
    transition: all 0.4s;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 40px rgba(10, 22, 40, 0.15);
}

.card:hover::before {
    width: 80px;
    height: 80px;
    opacity: 0.08;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

/* Section */
.section {
    padding: 4rem 2rem;
}

.section-label {
    font-size: 0.75rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--cyan-dark);
    margin-bottom: 1rem;
    font-weight: 700;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 2rem;
}

/* Form Elements */
.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid #ddd;
    background: white;
    font-family: 'Crimson Pro', serif;
    font-size: 1rem;
    transition: all 0.3s;
    clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--cyan);
    box-shadow: 0 0 0 3px rgba(0, 217, 255, 0.1);
}

.form-label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--navy);
}

/* Grid */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

/* Footer */
footer {
    background: var(--navy);
    color: var(--gray);
    padding: 3rem 2rem;
    text-align: center;
    border-top: 1px solid var(--navy-light);
}

footer a {
    color: var(--cyan);
    text-decoration: none;
    transition: color 0.3s;
}

footer a:hover {
    color: var(--warm-white);
}

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

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.animate-up {
    animation: slideUp 0.8s ease-out;
}

.animate-down {
    animation: slideDown 0.8s ease-out;
}

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

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 2rem 1rem;
    }

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