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

body {
    font-family: 'Impact', 'Arial Black', sans-serif;
    background: #0a0a0a;
    background-image:
        repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(255, 68, 0, 0.03) 2px, rgba(255, 68, 0, 0.03) 4px),
        linear-gradient(135deg, #1a1a1a 0%, #0a0a0a 100%);
    min-height: 100vh;
    padding: 20px;
    color: #fff;
    position: relative;
}

body::before {
    content: '🏋️';
    position: fixed;
    font-size: 300px;
    opacity: 0.03;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 0;
    pointer-events: none;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

h1 {
    text-align: center;
    color: #fff;
    font-size: 3.5rem;
    margin-bottom: 10px;
    text-shadow:
        0 0 10px rgba(255, 68, 0, 0.8),
        0 0 20px rgba(255, 68, 0, 0.6),
        0 0 30px rgba(255, 68, 0, 0.4),
        3px 3px 0 rgba(0,0,0,0.5);
    letter-spacing: 3px;
    font-weight: 900;
    text-transform: uppercase;
}

.subtitle {
    text-align: center;
    color: #ff6b35;
    margin-bottom: 30px;
    font-size: 1.1rem;
    font-family: 'Arial', sans-serif;
    letter-spacing: 1px;
    text-transform: uppercase;
    font-weight: bold;
}

.calculator-card {
    background: linear-gradient(145deg, #1a1a1a, #0f0f0f);
    border-radius: 20px;
    padding: 30px;
    box-shadow:
        0 10px 40px rgba(0,0,0,0.8),
        inset 0 1px 0 rgba(255, 68, 0, 0.2),
        0 0 30px rgba(255, 68, 0, 0.1);
    margin-bottom: 30px;
    border: 2px solid rgba(255, 68, 0, 0.3);
    position: relative;
    overflow: hidden;
}

.calculator-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 10px,
        rgba(255, 68, 0, 0.02) 10px,
        rgba(255, 68, 0, 0.02) 20px
    );
    pointer-events: none;
}

.input-section {
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 900;
    color: #ff6b35;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

.form-group select,
.form-group input {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid #333;
    border-radius: 10px;
    font-size: 1.1rem;
    transition: all 0.3s;
    background: #0a0a0a;
    color: #fff;
    font-weight: bold;
    font-family: 'Arial', sans-serif;
}

.form-group select:focus,
.form-group input:focus {
    outline: none;
    border-color: #ff4400;
    box-shadow: 0 0 20px rgba(255, 68, 0, 0.4);
    background: #1a1a1a;
}

.form-group select option {
    background: #0a0a0a;
    color: #fff;
    padding: 10px;
}

.input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.btn-voice {
    width: 100%;
    padding: 15px;
    background: linear-gradient(145deg, #2a2a2a, #1a1a1a);
    color: white;
    border: 2px solid #ff6b35;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
    letter-spacing: 1px;
    margin-bottom: 15px;
    font-family: 'Arial', sans-serif;
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.2);
}

.btn-voice:hover {
    background: linear-gradient(145deg, #3a3a3a, #2a2a2a);
    border-color: #ffaa00;
    box-shadow: 0 6px 20px rgba(255, 170, 0, 0.3);
    transform: translateY(-2px);
}

.btn-voice:active,
.btn-voice.listening {
    background: linear-gradient(145deg, #ff4400, #ff6b35);
    border-color: #ffaa00;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(255, 68, 0, 0.7);
    }
    50% {
        box-shadow: 0 0 0 10px rgba(255, 68, 0, 0);
    }
}

.voice-status {
    text-align: center;
    color: #ffaa00;
    font-size: 0.9rem;
    margin: -10px 0 15px 0;
    min-height: 20px;
    font-weight: bold;
}

.btn-calculate {
    width: 100%;
    padding: 18px;
    background: linear-gradient(145deg, #ff4400, #cc3300);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.3rem;
    font-weight: 900;
    cursor: pointer;
    transition: all 0.3s;
    text-transform: uppercase;
    letter-spacing: 2px;
    box-shadow:
        0 8px 0 #991100,
        0 10px 30px rgba(255, 68, 0, 0.4);
    position: relative;
    font-family: 'Impact', 'Arial Black', sans-serif;
}

.btn-calculate:hover {
    transform: translateY(-3px);
    box-shadow:
        0 11px 0 #991100,
        0 15px 40px rgba(255, 68, 0, 0.6);
}

.btn-calculate:active {
    transform: translateY(4px);
    box-shadow:
        0 4px 0 #991100,
        0 5px 20px rgba(255, 68, 0, 0.4);
}

.btn-calculate::before {
    content: '💪';
    margin-right: 10px;
    font-size: 1.2rem;
}

.result-section {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 2px solid #f0f0f0;
}

.result-section h2 {
    color: #ff6b35;
    margin-bottom: 20px;
    font-size: 2rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-shadow: 0 2px 10px rgba(255, 68, 0, 0.5);
}

.result-section h3 {
    color: #ff6b35;
    margin: 25px 0 15px 0;
    font-size: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.rm-display {
    background: linear-gradient(145deg, #ff4400, #ff6b35);
    color: white;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    margin-bottom: 15px;
    box-shadow:
        0 10px 0 #991100,
        0 15px 40px rgba(255, 68, 0, 0.5),
        inset 0 -3px 10px rgba(0,0,0,0.3);
    border: 3px solid #ffaa00;
    position: relative;
}

.rm-display::before {
    content: '🔥';
    position: absolute;
    top: 10px;
    right: 20px;
    font-size: 2rem;
    opacity: 0.3;
}

.btn-read-aloud {
    width: 100%;
    padding: 12px;
    background: linear-gradient(145deg, #1a3a5a, #0a2a4a);
    color: white;
    border: 2px solid #4a90ff;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
    letter-spacing: 1px;
    margin: 15px 0;
    font-family: 'Arial', sans-serif;
    box-shadow: 0 4px 15px rgba(74, 144, 255, 0.2);
}

.btn-read-aloud:hover {
    background: linear-gradient(145deg, #2a4a6a, #1a3a5a);
    border-color: #6ab0ff;
    box-shadow: 0 6px 20px rgba(106, 176, 255, 0.3);
    transform: translateY(-2px);
}

.btn-read-aloud:active,
.btn-read-aloud.playing {
    background: linear-gradient(145deg, #4a90ff, #6ab0ff);
    border-color: #8ac0ff;
}

.btn-read-aloud:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.improvement-advice {
    background: linear-gradient(145deg, #1a2a1a, #0a1a0a);
    border-left: 5px solid #4CAF50;
    padding: 20px;
    margin: 15px 0;
    border-radius: 10px;
    color: #a5d6a7;
    font-size: 1rem;
    line-height: 1.6;
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.2);
    font-weight: bold;
    font-family: 'Arial', sans-serif;
}

.improvement-advice::before {
    content: '💡 ';
    font-size: 1.2rem;
    margin-right: 8px;
}

.rm-label {
    font-size: 1.1rem;
    opacity: 0.95;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: bold;
}

.rm-value {
    font-size: 4rem;
    font-weight: 900;
    text-shadow:
        0 4px 0 rgba(0,0,0,0.3),
        0 0 20px rgba(255,255,255,0.5);
    letter-spacing: 3px;
}

.formula-info {
    text-align: center;
    margin-bottom: 20px;
    color: #aaa;
    font-family: 'Arial', sans-serif;
    font-weight: bold;
}

.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

thead {
    background: linear-gradient(145deg, #ff4400, #ff6b35);
    box-shadow: 0 4px 10px rgba(255, 68, 0, 0.3);
}

th {
    padding: 15px 12px;
    text-align: left;
    font-weight: 900;
    color: #fff;
    border-bottom: 3px solid #ffaa00;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
}

td {
    padding: 14px 12px;
    border-bottom: 1px solid #333;
    color: #fff;
    font-weight: bold;
}

tbody tr {
    background: rgba(26, 26, 26, 0.5);
    transition: all 0.3s;
}

tbody tr:hover {
    background: rgba(255, 68, 0, 0.1);
    transform: scale(1.02);
    box-shadow: 0 0 20px rgba(255, 68, 0, 0.2);
}

.percentage {
    color: #ffaa00;
    font-weight: 900;
    font-size: 1.1rem;
}

.info-section {
    background: linear-gradient(145deg, #1a1a1a, #0f0f0f);
    border-radius: 20px;
    padding: 30px;
    box-shadow:
        0 10px 40px rgba(0,0,0,0.8),
        0 0 30px rgba(255, 68, 0, 0.1);
    border: 2px solid rgba(255, 68, 0, 0.3);
}

.info-section h3 {
    color: #ff6b35;
    margin-bottom: 20px;
    font-size: 1.8rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-shadow: 0 2px 10px rgba(255, 68, 0, 0.5);
}

.info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.info-card {
    background: linear-gradient(145deg, #0a0a0a, #1a1a1a);
    padding: 20px;
    border-radius: 10px;
    border-left: 5px solid #ff4400;
    box-shadow: 0 5px 20px rgba(0,0,0,0.5);
    transition: all 0.3s;
}

.info-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(255, 68, 0, 0.3);
    border-left-color: #ffaa00;
}

.info-card h4 {
    color: #ff6b35;
    margin-bottom: 8px;
    font-size: 1.2rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.info-card p {
    color: #aaa;
    font-size: 0.9rem;
    margin-bottom: 10px;
    font-family: 'Arial', sans-serif;
}

.info-card code {
    display: block;
    background: #000;
    padding: 12px;
    border-radius: 5px;
    font-size: 0.85rem;
    color: #ffaa00;
    overflow-x: auto;
    border: 1px solid #333;
    font-weight: bold;
}

.note {
    color: #ffaa00;
    font-size: 0.9rem;
    line-height: 1.6;
    padding: 15px;
    background: rgba(255, 170, 0, 0.1);
    border-radius: 10px;
    border-left: 4px solid #ffaa00;
    border: 2px solid rgba(255, 170, 0, 0.3);
    font-family: 'Arial', sans-serif;
    font-weight: bold;
}

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    .input-row {
        grid-template-columns: 1fr;
    }

    .rm-value {
        font-size: 2.5rem;
    }

    .info-cards {
        grid-template-columns: 1fr;
    }
}