:root {
    --primary-blue: #2563eb;
    --primary-blue-light: #3b82f6;
    --primary-blue-dark: #1e40af;
    --secondary-dark: #0a0f1e;
    --secondary-dark-light: #0f1729;
    --secondary-dark-lighter: #1a2332;
    --accent-cyan: #06b6d4;
    --accent-cyan-light: #22d3ee;
    --accent-indigo: #4f46e5;
    --text-light: #e2e8f0;
    --text-muted: #94a3b8;
    --background: #0a0f1e;
    --surface: rgba(15, 23, 42, 0.7);
    --surface-light: rgba(30, 41, 59, 0.6);
}

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

html {
    background: linear-gradient(135deg, #0a0f1e 0%, #1e293b 50%, #0f172a 100%);
    min-height: 100vh;
    line-height: 1.5;
    -webkit-text-size-adjust: 100%;
    font-family: 'Inter', sans-serif;
}

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #0a0f1e 0%, #1e293b 50%, #0f172a 100%);
    background-attachment: fixed;
    background-repeat: no-repeat;
    background-size: cover;
    color: var(--text-light);
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

body::before {
    content: '';
    position: fixed;
    top: -10%;
    left: -10%;
    width: 120%;
    height: 120%;
    background: radial-gradient(circle at 20% 80%, rgba(37, 99, 235, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(59, 130, 246, 0.12) 0%, transparent 50%),
                radial-gradient(circle at 40% 40%, rgba(79, 70, 229, 0.08) 0%, transparent 50%);
    animation: backgroundShift 20s ease-in-out infinite;
    z-index: -1;
    pointer-events: none;
}

@keyframes backgroundShift {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(-10px, -10px) scale(1.02); }
    66% { transform: translate(10px, -5px) scale(0.98); }
}

a { text-decoration: none; }
ul, ol { list-style: none; }
img { max-width: 100%; height: auto; display: block; vertical-align: middle; }
button { cursor: pointer; font-family: inherit; }

.container {
    width: 100%;
    max-width: 1280px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1rem;
    padding-right: 1rem;
}
@media (min-width: 640px) { .container { max-width: 640px; } }
@media (min-width: 768px) { .container { max-width: 768px; } }
@media (min-width: 1024px) { .container { max-width: 1024px; } }
@media (min-width: 1280px) { .container { max-width: 1280px; } }

/* ===== Header ===== */
.header {
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid rgba(148, 163, 184, 0.1);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: all 0.3s ease;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 1rem;
    padding-bottom: 1rem;
}

.logo {
    font-family: 'Inter', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-blue);
    text-decoration: none;
    transition: all 0.3s ease;
    text-shadow: 0 0 20px rgba(37, 99, 235, 0.3);
}

.logo:hover {
    color: var(--primary-blue-light);
    transform: translateY(-1px);
    text-shadow: 0 0 30px rgba(59, 130, 246, 0.5);
}

.nav-center {
    display: flex;
    align-items: center;
    gap: 1rem;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.nav-link {
    color: var(--text-light);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    font-size: 0.95rem;
    font-weight: 500;
}

.nav-link:hover {
    color: var(--primary-blue-light);
    background: rgba(37, 99, 235, 0.1);
    backdrop-filter: blur(8px);
}

.nav-link.active {
    color: var(--primary-blue-light);
    background: rgba(37, 99, 235, 0.1);
}

.social-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.social-icon {
    color: var(--text-light);
    font-size: 0.95rem;
    padding: 0.45rem 0.7rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 500;
}

.social-icon:hover {
    color: var(--primary-blue-light);
    background: rgba(37, 99, 235, 0.1);
}

.mobile-menu-btn {
    background: none;
    border: none;
    color: var(--text-light);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    transition: color 0.3s ease;
    display: none;
}

.mobile-menu-btn:hover {
    color: var(--primary-blue);
}

/* ===== Mobile Nav ===== */
.mobile-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 250px;
    height: 100vh;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-left: 1px solid rgba(148, 163, 184, 0.2);
    box-shadow: -8px 0 32px rgba(0, 0, 0, 0.3);
    transition: right 0.3s ease;
    z-index: 1000;
    padding: 2rem 1.5rem;
}

.mobile-nav.active { right: 0; }

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

.mobile-nav-logo {
    text-align: center;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(148, 163, 184, 0.2);
    margin-bottom: 1rem;
}

.mobile-nav-logo span {
    color: var(--primary-blue);
    font-weight: 700;
    font-size: 1.2rem;
}

.mobile-nav-links {
    margin-top: 3rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.mobile-nav-link {
    color: var(--text-light);
    text-decoration: none;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.mobile-nav-link:hover {
    background: rgba(37, 99, 235, 0.15);
    backdrop-filter: blur(8px);
    color: var(--primary-blue-light);
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.1);
}

.mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

.mobile-overlay.active { opacity: 1; visibility: visible; }

/* ===== Content Container ===== */
.content-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
    z-index: 1;
    flex: 1;
}

/* ===== Page Title ===== */
.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-blue-light);
    text-align: center;
    margin-bottom: 2rem;
    text-shadow: 0 4px 16px rgba(37, 99, 235, 0.4);
}

/* ===== Navigation Links ===== */
.navigation-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 2rem 0;
}

.navigation-links a {
    color: var(--primary-blue-light);
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--primary-blue);
    border-radius: 8px;
    transition: all 0.3s ease;
    font-weight: 600;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.navigation-links a:hover {
    background: var(--primary-blue);
    color: white;
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
}

/* ===== Step Cards ===== */
.step {
    background: rgba(30, 41, 59, 0.5);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 16px;
    margin: 2rem 0;
    padding: 1.5rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
}

.step:hover {
    border-color: rgba(37, 99, 235, 0.4);
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(37, 99, 235, 0.2);
}

.step-button {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-dark));
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.step-button:hover {
    background: linear-gradient(135deg, var(--primary-blue-light), var(--primary-blue));
    box-shadow: 0 6px 24px rgba(37, 99, 235, 0.4);
}

.step-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.step-content {
    color: var(--text-light);
    line-height: 1.6;
}

.step-content p {
    margin-bottom: 0.5rem;
}

.step-image {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    margin: 1rem 0;
    border: 1px solid rgba(148, 163, 184, 0.2);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

/* ===== Footer ===== */
.footer {
    background: rgba(10, 15, 30, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid rgba(148, 163, 184, 0.1);
    padding: 2rem 0;
    margin-top: 2rem;
    text-align: center;
    color: var(--text-muted);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    body {
        background-attachment: scroll;
        background: linear-gradient(135deg, #0a0f1e 0%, #1e293b 50%, #0f172a 100%);
        min-height: 100vh;
    }

    .mobile-menu-btn { display: block; }
    .nav-center, .social-row { display: none; }

    .content-container { padding: 1rem; }
    .page-title { font-size: 2rem; }
    .navigation-links {
        flex-direction: column;
        align-items: center;
    }
}