:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --radius-lg: 24px;
    --radius-md: 16px;
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: 'Outfit', 'Noto Sans Sinhala', sans-serif;
    background: radial-gradient(circle at top right, #1e1b4b, #0f172a);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    line-height: 1.6;
}

.app-container {
    width: 100%;
    max-width: 1100px;
    animation: fadeIn 0.8s ease-out;
}

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

/* Header */
.main-header {
    text-align: center;
    margin-bottom: 40px;
}

.logo-area {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 12px;
}

.icon-box {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    padding: 10px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
}

.main-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.main-header h1 span {
    color: var(--accent-primary);
    background: linear-gradient(to right, #818cf8, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.main-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Converter Grid */
.converter-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    padding: 32px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

@media (min-width: 900px) {
    .converter-grid {
        grid-template-columns: 1fr 180px 1fr;
        align-items: start;
    }
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.char-count {
    font-size: 0.8rem;
    color: var(--text-muted);
}

textarea {
    width: 100%;
    height: 320px;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 20px;
    color: var(--text-main);
    font-family: inherit;
    font-size: 1.1rem;
    resize: none;
    transition: all 0.3s ease;
}

textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: rgba(15, 23, 42, 0.8);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

/* Controls */
.controls-section {
    display: flex;
    flex-direction: column;
    gap: 24px;
    padding-top: 40px;
}

@media (min-width: 900px) {
    .controls-section {
        height: 100%;
        justify-content: center;
        padding-top: 0;
    }
}

.control-group label {
    margin-bottom: 10px;
    display: block;
    text-align: center;
}

.select-wrapper {
    position: relative;
}

select {
    width: 100%;
    padding: 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    border-radius: 12px;
    font-family: inherit;
    font-weight: 600;
    cursor: pointer;
    appearance: none;
}

.button-row {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px;
    border: none;
    border-radius: 12px;
    font-family: inherit;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-secondary {
    background: var(--accent-primary);
    color: white;
}

.btn-secondary:hover {
    background: var(--accent-secondary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.btn-ghost {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
}

.btn-ghost:hover {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

/* Footer */
.info-footer {
    margin-top: 30px;
    text-align: center;
    background: rgba(99, 102, 241, 0.05);
    padding: 16px;
    border-radius: 16px;
    border: 1px dashed rgba(99, 102, 241, 0.2);
}

.info-footer p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.info-footer strong {
    color: var(--accent-primary);
}

.app-footer {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--glass-border);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    text-align: center;
}

@media (min-width: 600px) {
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
    }
}

.credit {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.credit strong {
    color: var(--text-main);
}

.footer-links {
    display: flex;
    align-items: center;
    gap: 15px;
}

.footer-link {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
}

.footer-link:hover {
    color: var(--accent-primary);
}

.donate {
    color: #fbbf24;
}

.donate:hover {
    color: #f59e0b;
    transform: scale(1.05);
}

.divider {
    color: var(--glass-border);
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-links a {
    color: var(--text-muted);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
}

.social-links a:hover {
    color: var(--accent-primary);
    transform: translateY(-2px);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: #10b981;
    color: white;
    padding: 12px 24px;
    border-radius: 30px;
    font-weight: 600;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}