:root {
    --bg-color: #0d0d11;
    --accent-color: #00ff66;
    --accent-glow: rgba(0, 255, 102, 0.25);
    --card-bg: rgba(20, 25, 22, 0.7);
    --text-color: #00ff66;
    --text-muted: #a3ffca;
    --font-primary: "Google Sans Flex", -apple-system, BlinkMacSystemFont, sans-serif;
    --font-code: "Google Sans Code", monospace;
}

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

html, body {
    width: 100%;
    min-height: 100vh;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-primary);
    user-select: none;
    line-height: 1.5;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: clamp(1rem, 4vw, 2.5rem);
    background: radial-gradient(circle at 50% 20%, #152219 0%, #0d0d11 70%);
}

.page-container {
    width: 100%;
    max-width: 900px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: clamp(1.5rem, 4vw, 2.5rem);
    text-align: center;
}

.header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
}

.main-title {
    font-family: var(--font-primary);
    font-size: clamp(1.75rem, 5vw, 3rem);
    font-weight: 700;
    color: var(--text-color);
    letter-spacing: -0.02em;
    text-shadow: 0 0 15px var(--accent-glow);
}

.code-font {
    font-family: var(--font-code);
    font-weight: 600;
}

.signature-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    font-size: clamp(1rem, 2.5vw, 1.35rem);
    font-weight: 500;
    color: var(--text-muted);
}

.signature-img {
    height: clamp(28px, 6vw, 42px);
    width: auto;
    max-width: 180px;
    object-fit: contain;
    filter: drop-shadow(0 0 6px var(--accent-color));
    transition: transform 0.3s ease;
}

.signature-badge:hover .signature-img {
    transform: scale(1.08) rotate(-2deg);
}

.content-main {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: clamp(1.5rem, 4vw, 2.5rem);
}

.card {
    width: 100%;
    background: var(--card-bg);
    border: 2px solid var(--accent-color);
    border-radius: 16px;
    padding: clamp(1.25rem, 4vw, 2.5rem);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 0 25px var(--accent-glow), inset 0 0 15px rgba(0, 255, 102, 0.05);
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 35px rgba(0, 255, 102, 0.35), inset 0 0 20px rgba(0, 255, 102, 0.08);
}

.card-headline {
    font-size: clamp(1.2rem, 3vw, 1.75rem);
    font-weight: 600;
    line-height: 1.35;
    color: var(--text-color);
}

.card-subhead {
    font-size: clamp(1rem, 2.2vw, 1.25rem);
    font-weight: 400;
    opacity: 0.9;
}

.card-skills {
    font-family: var(--font-primary);
    font-size: clamp(1.1rem, 2.6vw, 1.5rem);
    font-weight: 600;
    line-height: 1.45;
    color: #ffffff;
    background: rgba(0, 255, 102, 0.1);
    border-left: 4px solid var(--accent-color);
    padding: 1rem 1.25rem;
    border-radius: 8px;
}

.cta-container {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding-top: 0.5rem;
}

.btn-signup {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 200px;
    min-height: 54px;
    padding: 14px 32px;
    border: 2px solid var(--accent-color);
    border-radius: 30px;
    color: var(--accent-color);
    background: transparent;
    font-family: var(--font-primary);
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 15px var(--accent-glow);
}

.btn-signup:hover {
    background: var(--accent-color);
    color: #0d0d11;
    box-shadow: 0 0 25px rgba(0, 255, 102, 0.6);
    transform: translateY(-2px) scale(1.02);
}

.btn-signup:active {
    transform: translateY(0) scale(0.98);
}

.btn-signup:focus-visible {
    outline: 3px solid #ffffff;
    outline-offset: 4px;
}

.loader {
    width: 28px;
    aspect-ratio: 1;
    --_g: no-repeat radial-gradient(circle closest-side, currentColor 90%, #0000);
    background: 
        var(--_g) 0    0,
        var(--_g) 0    100%,
        var(--_g) 100% 100%;
    background-size: 40% 40%;
    animation: l11 1s infinite linear;
}

@keyframes l11 {
    25% { background-position: 100% 0, 0 100%, 100% 100%; }
    50% { background-position: 100% 0, 0 0, 100% 100%; }
    75% { background-position: 100% 0, 0 0, 0 100%; }
    100% { background-position: 100% 100%, 0 0, 0 100%; }
}

@media (max-width: 480px) {
    body {
        padding: 1rem 0.75rem;
    }
    
    .card {
        padding: 1.25rem 1rem;
        gap: 1rem;
    }
    
    .btn-signup {
        width: 100%;
        max-width: 300px;
    }
}