:root {
    --primary: #8a2be2;
    --primary-hover: #9d4edd;
    --bg-gradient: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-main: #ffffff;
    --text-muted: #b0b0c0;
    --box-bg: rgba(0, 0, 0, 0.2);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
}

body {
    min-height: 100vh;
    background: var(--bg-gradient);
    display: flex;
    flex-direction: column;
    color: var(--text-main);
}

/* Header */
.app-header {
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    padding: 15px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(to right, #e0c3fc, #8ec5fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tabs {
    display: flex;
    gap: 10px;
}

.tab-btn {
    background: transparent;
    border: 1px solid transparent;
    padding: 8px 16px;
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
}

/* Main */
.app-main {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px 20px;
}

.calculator-container {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 40px;
    width: 100%;
    max-width: 480px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease;
}

.calculator-container:hover {
    transform: translateY(-5px);
}

.header-text {
    text-align: center;
    margin-bottom: 30px;
}

.header-text h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(to right, #e0c3fc, #8ec5fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header-text p {
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 300;
}

.input-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 30px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-group label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.input-group input {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 14px 16px;
    color: var(--text-main);
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
    color-scheme: dark;
}

.input-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 15px rgba(138, 43, 226, 0.3);
}

.action-btn {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    border: none;
    border-radius: 12px;
    padding: 16px;
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 10px 20px rgba(138, 43, 226, 0.2);
}

.action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 25px rgba(138, 43, 226, 0.4);
}

.action-btn:active {
    transform: translateY(1px);
}

.result-section {
    display: flex;
    justify-content: space-between;
    gap: 15px;
    margin-bottom: 20px;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.5s ease;
}

.result-section.show {
    opacity: 1;
    transform: translateY(0);
}

.result-box {
    flex: 1;
    background: var(--box-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 20px 10px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 5px;
    transition: transform 0.3s ease;
}

.result-box.full-width {
    flex: none;
    width: 100%;
}

.result-box:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.08);
}

.result-box .value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-main);
}

.result-box .label {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.extra-details {
    text-align: center;
    opacity: 0;
    transition: opacity 0.5s ease;
    transition-delay: 0.2s;
}

.extra-details.show {
    opacity: 1;
}

.extra-details p {
    color: #e0c3fc;
    font-size: 0.95rem;
    font-weight: 400;
}

.result-section.vertical-list {
    flex-direction: column;
    gap: 10px;
}

.result-list-item {
    background: var(--box-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 16px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: transform 0.3s ease, background 0.3s ease;
}

.result-list-item:hover {
    transform: translateY(-3px);
    background: rgba(255, 255, 255, 0.08);
}

.result-list-item .label {
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 500;
}

.result-list-item .value {
    color: var(--text-main);
    font-size: 1.1rem;
    font-weight: 600;
}

/* Footer */
.app-footer {
    background: rgba(0, 0, 0, 0.2);
    border-top: 1px solid var(--glass-border);
    text-align: center;
    padding: 15px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

@media (max-width: 600px) {
    .app-header {
        flex-direction: column;
        gap: 15px;
        padding: 15px 20px;
    }
}

@media (max-width: 400px) {
    .calculator-container {
        padding: 25px;
    }
    
    .result-section {
        flex-direction: column;
    }
}