* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

:root {
    --primary-red: #e74c3c;
    --primary-blue: #3498db;
    --primary-dark: #0d0d0d;
    --card-bg: #1a1a1a;
    --card-border: #333;
    --text-primary: #ffffff;
    --text-secondary: #e6e6e6;
    --text-muted: #cccccc;
}

body {
    background: var(--primary-dark);
    color: var(--text-secondary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
    line-height: 1.5;
}

.container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 1.5rem;
    padding: 0 1rem;
}

h1 {
    font-size: clamp(1.8rem, 5vw, 2.5rem);
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    letter-spacing: 0.5px;
}

.subtitle {
    font-size: clamp(0.9rem, 3vw, 1.1rem);
    opacity: 0.7;
    margin-bottom: 1.5rem;
}

.input-section, .bracket-section {
    background: var(--card-bg);
    border-radius: 10px;
    padding: clamp(1rem, 3vw, 1.5rem);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--card-border);
    margin-bottom: 1.5rem;
}

.section-title {
    font-size: clamp(1.1rem, 3vw, 1.3rem);
    margin-bottom: 1rem;
    color: var(--text-primary);
    border-bottom: 2px solid #555;
    padding-bottom: 0.5rem;
}

.team-inputs {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.input-group {
    flex: 1 1 calc(50% - 1rem);
    min-width: 150px;
}

.team-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
    color: var(--text-muted);
    font-size: clamp(0.9rem, 2vw, 1rem);
}

.team-input {
    width: 100%;
    padding: 0.8rem;
    border: none;
    border-radius: 5px;
    background: #2a2a2a;
    color: var(--text-primary);
    font-size: clamp(0.9rem, 2vw, 1rem);
    transition: all 0.3s;
    border: 1px solid #444;
}

.team-input:focus {
    outline: none;
    border-color: #666;
    box-shadow: 0 0 0 2px rgba(100, 100, 100, 0.3);
}

.draw-button {
    background: var(--primary-red);
    border: none;
    color: white;
    padding: 1rem 2rem;
    font-size: clamp(1rem, 2.5vw, 1.1rem);
    border-radius: 5px;
    cursor: pointer;
    width: 100%;
    transition: all 0.3s;
    font-weight: bold;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.draw-button:hover {
    background: #c0392b;
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.4);
}

.draw-button:active {
    transform: translateY(0);
}

.draw-button:disabled {
    background: #7f8c8d;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.tournament-bracket {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    min-height: 250px;
    padding: 0 1rem;
}

.bracket-side {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 30%;
    height: 180px;
}

.bracket-team {
    padding: 1rem;
    background: var(--primary-blue);
    border: 1px solid #2980b9;
    border-radius: 5px;
    text-align: center;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    position: relative;
    color: white;
    font-weight: bold;
    font-size: clamp(0.9rem, 2vw, 1rem);
}

.bracket-team.filled {
    background: #2980b9;
    border-color: #2471a3;
    box-shadow: 0 0 10px rgba(41, 128, 185, 0.5);
    animation: fadeIn 2s;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.connector-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.connector {
    position: absolute;
    background: #555;
}

.connector.horizontal {
    height: 2px;
}

.connector.vertical {
    width: 2px;
}

.connector.left-top {
    left: 30%;
    top: 25%;
    width: 8%;
    height: 2px;
}

.connector.left-bottom {
    left: 30%;
    top: 75%;
    width: 8%;
    height: 2px;
}

.connector.left-v {
    left: 38%;
    top: 25%;
    width: 2px;
    height: 50%;
}

.connector.left-to-final {
    left: 38%;
    top: 50%;
    width: 12%;
    height: 2px;
}

.connector.right-top {
    right: 30%;
    top: 25%;
    width: 8%;
    height: 2px;
}

.connector.right-bottom {
    right: 30%;
    top: 75%;
    width: 8%;
    height: 2px;
}

.connector.right-v {
    right: 38%;
    top: 25%;
    width: 2px;
    height: 50%;
}

.connector.right-to-final {
    right: 38%;
    top: 50%;
    width: 12%;
    height: 2px;
}

.bracket-center {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    width: 18%;
    position: relative;
    height: 135px;
    z-index: 2;
}

.final-match {
    padding: 0.75rem;
    background: #2a2a2a;
    border: 1px solid #444;
    border-radius: 5px;
    text-align: center;
    width: 100%;
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    height: 100%;
    align-items: center;
}

.final-title {
    position: absolute;
    top: -25px;
    left: 0;
    width: 100%;
    font-size: clamp(1rem, 2.5vw, 1.1rem);
    color: var(--text-primary);
    text-align: center;
}

.final-team {
    padding: 0.8rem;
    background: #444;
    border: 1px solid #555;
    border-radius: 5px;
    height: 45px;
    width: 48%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: clamp(0.8rem, 2vw, 0.9rem);
}

.status {
    margin-top: 1.5rem;
    padding: 1rem;
    background: #2a2a2a;
    border-radius: 5px;
    text-align: center;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid #444;
    font-size: clamp(0.9rem, 2.5vw, 1rem);
}

.status.highlight {
    background: #3a3a3a;
    border-color: #666;
    box-shadow: 0 0 10px rgba(100, 100, 100, 0.3);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(100, 100, 100, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(100, 100, 100, 0); }
    100% { box-shadow: 0 0 0 0 rgba(100, 100, 100, 0); }
}

@media (max-width: 1024px) {
    .container {
        max-width: 95%;
    }
    
    .tournament-bracket {
        min-height: 220px;
    }
    
    .bracket-side {
        height: 160px;
    }
    
    .bracket-team {
        min-height: 55px;
        padding: 0.8rem;
    }
    
    .bracket-center {
        height: 120px;
    }
    
    .final-team {
        height: 40px;
    }
}

@media (max-width: 768px) {
    body {
        padding: 0.5rem;
    }
    
    .container {
        max-width: 100%;
    }
    
    .input-section, .bracket-section {
        padding: 1rem;
        margin-bottom: 1rem;
    }
    
    .team-inputs {
        gap: 0.8rem;
    }
    
    .input-group {
        flex: 1 1 100%;
    }
    
    .tournament-bracket {
        flex-direction: column;
        min-height: auto;
        padding: 0;
    }
    
    .bracket-side {
        width: 100%;
        height: auto;
        flex-direction: row;
        justify-content: space-around;
        margin-bottom: 2rem;
        gap: 1rem;
    }
    
    .bracket-team {
        width: 45%;
        min-height: 60px;
    }
    
    .bracket-center {
        width: 100%;
        order: 3;
        height: auto;
        margin-bottom: 1rem;
    }
    
    .final-match {
        flex-direction: column;
        gap: 1rem;
        height: auto;
        padding: 1rem;
    }
    
    .final-team {
        width: 100%;
        height: 50px;
    }
    
    .final-title {
        position: static;
        margin-bottom: 0.5rem;
    }
    
    .connector-container {
        display: none;
    }
    
    .status {
        margin-top: 1rem;
        padding: 0.8rem;
    }
}

@media (max-width: 480px) {
    header {
        margin-bottom: 1rem;
    }
    
    h1 {
        font-size: 1.6rem;
    }
    
    .subtitle {
        font-size: 0.9rem;
    }
    
    .input-section, .bracket-section {
        padding: 0.8rem;
        border-radius: 8px;
    }
    
    .section-title {
        font-size: 1.1rem;
    }
    
    .team-inputs {
        gap: 0.6rem;
        margin-bottom: 1rem;
    }
    
    .team-label {
        font-size: 0.9rem;
    }
    
    .team-input {
        padding: 0.7rem;
    }
    
    .draw-button {
        padding: 0.8rem 1.5rem;
    }
    
    .bracket-side {
        margin-bottom: 1.5rem;
    }
    
    .bracket-team {
        min-height: 55px;
        padding: 0.7rem;
        font-size: 0.9rem;
    }
    
    .final-match {
        padding: 0.8rem;
    }
    
    .final-team {
        height: 45px;
        font-size: 0.85rem;
    }
    
    .status {
        padding: 0.7rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 360px) {
    .bracket-team {
        min-height: 50px;
        padding: 0.6rem;
        font-size: 0.85rem;
    }
    
    .final-team {
        height: 40px;
        font-size: 0.8rem;
    }
    
    .draw-button {
        padding: 0.7rem 1.2rem;
    }

}