:root {
    --bg-main: #000000;
    --bg-card: #111827;
    --accent: #27d494;
    --accent-hover: #1fb981;
    --border: #1f2937;
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --font-main: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-main);
    margin: 0;
    padding: 60px 20px;
    display: flex;
    justify-content: center;
}

.container { max-width: 1000px; width: 100%; }

/* Header & Back Btn */
.header { margin-bottom: 40px; }
.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 25px;
    transition: 0.3s;
}
.back-btn:hover { color: var(--accent); transform: translateX(-5px); }
.brand-wrapper { display: flex; align-items: center; gap: 15px; }
.brand-logo { width: 50px; height: 50px; border-radius: 10px; }
.brand-title h1 { font-size: 1.8rem; margin: 0; }
.brand-title h1 span { color: var(--accent); }

/* Grid Layout */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr; /* වම් පැත්ත 1ක් නම් දකුණු පැත්ත 1.5ක ඉඩක් */
    gap: 30px;
}

/* Info Cards (Left) */
.info-cards { display: flex; flex-direction: column; gap: 15px; }
.info-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 20px;
    border-radius: 16px;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 20px;
    transition: 0.3s;
}
.info-card:hover { border-color: var(--accent); transform: scale(1.02); }
.info-card i { font-size: 1.8rem; }
.info-card .info-text h4 { margin: 0; font-size: 0.85rem; color: var(--text-secondary); }
.info-card .info-text p { margin: 3px 0 0; font-weight: 600; color: var(--text-primary); }

/* Message Box (Right) */
.message-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 35px;
    border-radius: 20px;
}
.message-box h3 { margin: 0 0 25px; font-size: 1.3rem; display: flex; align-items: center; gap: 10px; }
.message-box h3 i { color: var(--accent); }

.input-group { margin-bottom: 20px; }
.input-group label { display: block; font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 8px; }
.input-group input, .input-group textarea {
    width: 100%;
    background: #000;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px 15px;
    color: #fff;
    font-family: inherit;
    transition: 0.3s;
}
.input-group input:focus, .input-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 10px rgba(39, 212, 148, 0.1);
}

.send-btn {
    width: 100%;
    background: var(--accent);
    color: #000;
    border: none;
    padding: 14px;
    border-radius: 8px;
    font-weight: 700;
    cursor: pointer;
    transition: 0.3s;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}
.send-btn:hover { background: var(--accent-hover); transform: translateY(-2px); }

/* Footer */
.footer { margin-top: 60px; text-align: center; opacity: 0.4; font-size: 0.8rem; }

/* Responsive */
@media (max-width: 850px) {
    .contact-grid { grid-template-columns: 1fr; }
    .message-box { padding: 25px; }

}

/* Back Icon Button Styling */
.back-icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    background-color: #161b22; /* පේජ් එකට වඩා පොඩ්ඩක් තද පාටක් */
    color: #4ade80; /* ඔයාගේ Mint Green පාට */
    border-radius: 50%; /* රවුම් බටන් එකක් */
    text-decoration: none;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    border: 1px solid #30363d;
    margin-bottom: 30px; /* පල්ලෙහයින් තියෙන Content එකට ඉඩ තියන්න */
}

/* Mouse එක උඩට ගියාම වෙනස් වෙන විදිහ */
.back-icon-btn:hover {
    background-color: #4ade80;
    color: #05070a; /* Background එකේ කළු පාට */
    transform: translateX(-5px); /* වමට පොඩ්ඩක් මූව් වෙනවා */
    box-shadow: 0 0 15px rgba(74, 222, 128, 0.3);
}