/* ===== CSS Variables ===== */
:root {
    --bg-primary: #0a0a1a;
    --bg-secondary: #12122a;
    --bg-tertiary: #1a1a3a;
    --accent-primary: #4a9eff;
    --accent-secondary: #7b5cff;
    --text-primary: #ffffff;
    --text-secondary: #a0a0c0;
    --border-color: #2a2a4a;
    --success: #4caf50;
    --danger: #f44336;
    --warning: #ff9800;

    /* Faction Colors */
    --faction-player: #4a9eff;
    --faction-1: #ff4a4a;
    --faction-2: #4aff7a;
    --faction-3: #ffcc4a;
    --faction-4: #aa4aff;
    --faction-5: #ff7a4a;
    --neutral: #606080;
}

/* ===== Reset & Base ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ===== Game Container ===== */
.game-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== Header ===== */
.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 25px;
    background: var(--bg-tertiary);
    border-radius: 15px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.game-header h1 {
    font-size: 1.8rem;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.game-info {
    display: flex;
    gap: 25px;
}

.game-info span {
    color: var(--text-secondary);
    font-size: 1rem;
    padding: 8px 15px;
    background: var(--bg-secondary);
    border-radius: 8px;
}

/* ===== Language Switcher ===== */
.lang-switcher {
    position: relative;
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 2px 12px rgba(74, 158, 255, 0.3);
}

.lang-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(74, 158, 255, 0.5);
}

.lang-globe {
    font-size: 1.2rem;
}

.lang-current {
    font-weight: 700;
    letter-spacing: 0.5px;
}

.lang-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    overflow-y: auto;
    max-height: 320px;
    z-index: 200;
    min-width: 200px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
    animation: dropdownAppear 0.2s ease-out;
    /* Custom scrollbar */
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

.lang-dropdown.open {
    display: block;
}

@keyframes dropdownAppear {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.lang-option {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 12px 16px;
    background: none;
    color: var(--text-primary);
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
    transition: background 0.2s;
}

.lang-option:hover {
    background: var(--bg-secondary);
}

.lang-option.active {
    background: rgba(74, 158, 255, 0.15);
    color: var(--accent-primary);
    font-weight: 600;
}

.lang-flag {
    font-size: 1.3rem;
}

/* ===== Tutorial Overlay ===== */
.tutorial-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    animation: fadeIn 0.4s ease-out;
}

.tutorial-overlay.hidden {
    display: none;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.tutorial-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 40px 48px;
    max-width: 520px;
    width: 90%;
    box-shadow: 0 0 60px rgba(74, 158, 255, 0.2);
    animation: modalAppear 0.4s ease-out;
}

.tutorial-card h2 {
    font-size: 1.8rem;
    margin-bottom: 28px;
    text-align: center;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tutorial-steps {
    position: relative;
    min-height: 120px;
}

.tutorial-step {
    display: none;
    animation: stepFadeIn 0.35s ease-out;
}

.tutorial-step.active {
    display: block;
}

@keyframes stepFadeIn {
    from {
        opacity: 0;
        transform: translateX(20px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.tutorial-step-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.tutorial-step-desc {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.tutorial-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 28px 0 24px;
}

.tutorial-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border-color);
    transition: all 0.3s ease;
    cursor: pointer;
}

.tutorial-dot.active {
    background: var(--accent-primary);
    transform: scale(1.3);
    box-shadow: 0 0 8px rgba(74, 158, 255, 0.5);
}

.tutorial-buttons {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.tutorial-nav {
    display: flex;
    gap: 10px;
}

.btn-tutorial-skip {
    padding: 10px 20px;
    background: none;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    cursor: pointer;
    font-size: 0.95rem;
    transition: all 0.2s;
}

.btn-tutorial-skip:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

.btn-tutorial-nav {
    padding: 10px 24px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-tutorial-nav:hover:not(:disabled) {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

.btn-tutorial-nav:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-tutorial-nav.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border: none;
}

.btn-tutorial-nav.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(74, 158, 255, 0.4);
}

/* ===== Main Layout ===== */
.game-main {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 20px;
    flex: 1;
    align-items: start;
}

/* ===== Map Container ===== */
.map-container {
    background: var(--bg-tertiary);
    border-radius: 15px;
    padding: 20px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
}

#map-svg {
    width: 100%;
    height: 100%;
    min-height: 500px;
}

/* Territory Styles */
.territory {
    cursor: pointer;
    transition: all 0.3s ease;
    stroke: rgba(255, 255, 255, 0.3);
    stroke-width: 1;
}

.territory:hover {
    filter: brightness(1.2);
    stroke: white;
    stroke-width: 2;
}

.territory.selected {
    stroke: white;
    stroke-width: 3;
    filter: brightness(1.3);
    animation: pulse 1s infinite;
}

.territory.targetable {
    stroke: var(--danger);
    stroke-width: 2;
    stroke-dasharray: 5, 3;
    animation: targetPulse 0.8s infinite;
}

.territory.friendly {
    stroke: var(--success);
    stroke-width: 2;
}

@keyframes pulse {

    0%,
    100% {
        filter: brightness(1.3);
    }

    50% {
        filter: brightness(1.5);
    }
}

@keyframes targetPulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.7;
    }
}

/* Territory Labels */
.territory-label {
    font-size: 10px;
    fill: white;
    text-anchor: middle;
    pointer-events: none;
    font-weight: bold;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8);
}

.territory-points {
    font-size: 14px;
    fill: white;
    text-anchor: middle;
    pointer-events: none;
    font-weight: bold;
}

/* Attack Animation */
.attack-line {
    stroke: var(--danger);
    stroke-width: 3;
    stroke-linecap: round;
    fill: none;
    animation: attackMove 0.5s ease-out;
}

@keyframes attackMove {
    from {
        stroke-dashoffset: 100;
    }

    to {
        stroke-dashoffset: 0;
    }
}

.attack-explosion {
    animation: explode 0.5s ease-out forwards;
}

@keyframes explode {
    0% {
        r: 5;
        opacity: 1;
    }

    100% {
        r: 30;
        opacity: 0;
    }
}

/* Reinforcement Animation */
.reinforce-line {
    stroke-linecap: round;
    fill: none;
    animation: reinforceMove 0.4s ease-out;
}

@keyframes reinforceMove {
    from {
        stroke-dashoffset: 50;
    }

    to {
        stroke-dashoffset: 0;
    }
}

.reinforce-arrival {
    animation: reinforceArrive 0.4s ease-out forwards;
}

@keyframes reinforceArrive {
    0% {
        r: 5;
        opacity: 1;
    }

    100% {
        r: 20;
        opacity: 0;
    }
}

/* ===== Side Panel ===== */
.side-panel {
    display: flex;
    flex-direction: column;
    gap: 15px;
    max-height: calc(100vh - 140px);
    overflow-y: auto;
    position: sticky;
    top: 20px;
}

.panel-section {
    background: var(--bg-tertiary);
    border-radius: 12px;
    padding: 15px;
    border: 1px solid var(--border-color);
}

.panel-section h3 {
    font-size: 0.95rem;
    color: var(--accent-primary);
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

/* Faction Status */
#faction-status {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.faction-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    background: var(--bg-secondary);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.faction-item.eliminated {
    opacity: 0.4;
    text-decoration: line-through;
}

.faction-item.player {
    border: 1px solid var(--accent-primary);
}

.faction-color {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    flex-shrink: 0;
}

.faction-name {
    flex: 1;
    font-size: 0.9rem;
}

.faction-territories {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Selected Territory Info */
#selected-info {
    padding: 10px;
    background: var(--bg-secondary);
    border-radius: 8px;
    margin-bottom: 10px;
}

#selected-info .territory-name {
    font-size: 1.1rem;
    font-weight: bold;
    margin-bottom: 5px;
}

#selected-info .territory-details {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Attack Controls */
.attack-controls {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.attack-controls label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

#attack-slider {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: var(--bg-secondary);
    outline: none;
    -webkit-appearance: none;
}

#attack-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent-primary);
    cursor: pointer;
    transition: all 0.2s ease;
}

#attack-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

#attack-amount {
    font-size: 1.5rem;
    font-weight: bold;
    text-align: center;
    color: var(--accent-primary);
}

/* Buttons */
.btn-attack {
    padding: 12px;
    background: linear-gradient(135deg, var(--danger), #ff6b6b);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-attack:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(244, 67, 54, 0.4);
}

.btn-cancel {
    padding: 10px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-cancel:hover {
    background: var(--bg-primary);
}

.btn-control {
    flex: 1;
    padding: 10px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.85rem;
}

.btn-control:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

.btn-control.active {
    background: var(--accent-secondary);
    border-color: var(--accent-secondary);
}

.control-buttons {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

/* Faction Selector */
.faction-selector {
    display: flex;
    align-items: center;
    gap: 10px;
}

.faction-selector label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.faction-selector select {
    flex: 1;
    padding: 8px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    outline: none;
    cursor: pointer;
}

/* Game Log */
.game-log {
    max-height: 150px;
    overflow-y: auto;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.game-log::-webkit-scrollbar {
    width: 6px;
}

.game-log::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.log-entry {
    padding: 5px 0;
    border-bottom: 1px solid var(--border-color);
}

.log-entry.attack {
    color: var(--danger);
}

.log-entry.conquest {
    color: var(--warning);
}

.log-entry.elimination {
    color: var(--accent-secondary);
}

.log-entry.reinforce {
    color: var(--faction-2);
}

/* ===== Modal ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background: var(--bg-tertiary);
    padding: 40px;
    border-radius: 20px;
    text-align: center;
    border: 2px solid var(--accent-primary);
    box-shadow: 0 0 50px rgba(74, 158, 255, 0.3);
    animation: modalAppear 0.3s ease-out;
}

@keyframes modalAppear {
    from {
        transform: scale(0.8);
        opacity: 0;
    }

    to {
        transform: scale(1);
        opacity: 1;
    }
}

.modal-content h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    background: linear-gradient(90deg, #ffd700, #ffaa00);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.modal-content p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 25px;
}

.btn-primary {
    padding: 15px 40px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(74, 158, 255, 0.4);
}

/* ===== Instructions ===== */
.instructions {
    text-align: center;
    padding: 15px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .game-main {
        grid-template-columns: 1fr;
    }

    .side-panel {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .panel-section {
        flex: 1;
        min-width: 250px;
    }
}

@media (max-width: 600px) {
    .game-header {
        flex-direction: column;
        gap: 10px;
    }

    .game-header h1 {
        font-size: 1.4rem;
    }
}