/* ============================================
   STAR DEFENSE - 星际防线
   Sci-Fi Space Shooter Game Styles
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=Rajdhani:wght@300;400;600;700&display=swap');

:root {
    --cyan: #00f0ff;
    --cyan-dim: #00f0ff44;
    --cyan-glow: #00f0ff88;
    --red: #ff2244;
    --red-dim: #ff224444;
    --orange: #ff8800;
    --green: #00ff88;
    --purple: #aa44ff;
    --gold: #ffd700;
    --bg-dark: #050a14;
    --bg-panel: #0a1428cc;
    --text: #e0eaff;
    --text-dim: #6688aa;
    --font-display: 'Orbitron', monospace;
    --font-ui: 'Rajdhani', sans-serif;
}

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

body {
    background: var(--bg-dark);
    color: var(--text);
    font-family: var(--font-ui);
    overflow: hidden;
    width: 100vw;
    height: 100vh;
    user-select: none;
    -webkit-user-select: none;
}

#game-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

/* --- Scenes --- */
.scene {
    position: absolute;
    inset: 0;
    display: none;
    opacity: 0;
    transition: opacity 0.5s ease;
}
.scene.active {
    display: flex;
    opacity: 1;
    z-index: 10;
}
.scene canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

/* --- Intro Scene --- */
#intro-scene {
    background: #000;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

#intro-scene video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.intro-container {
    position: relative;
    z-index: 5;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    max-width: 800px;
    padding: 0 2rem;
}

.intro-portrait {
    flex-shrink: 0;
    width: 140px;
    height: 180px;
    border: 2px solid var(--cyan-dim);
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 0 20px var(--cyan-dim);
    animation: portraitGlow 3s ease-in-out infinite alternate;
}

.intro-portrait img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

@keyframes portraitGlow {
    from { box-shadow: 0 0 15px var(--cyan-dim); }
    to { box-shadow: 0 0 30px var(--cyan), 0 0 50px var(--cyan-dim); }
}

.intro-text {
    position: relative;
    z-index: 5;
    max-width: 600px;
    padding: 0;
    text-align: left;
}

.intro-text .line {
    font-family: var(--font-ui);
    font-size: 1.25rem;
    font-weight: 300;
    color: var(--text);
    line-height: 1.8;
    opacity: 0;
    transform: translateY(10px);
    animation: textFadeIn 0.8s ease forwards;
    text-shadow: 0 0 20px var(--cyan-dim);
}

.intro-text .line.speaker {
    font-family: var(--font-display);
    font-size: 0.85rem;
    color: var(--cyan);
    margin-bottom: 0.25rem;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.intro-skip {
    position: absolute;
    bottom: 2rem;
    right: 2rem;
    font-family: var(--font-display);
    font-size: 0.7rem;
    color: var(--text-dim);
    letter-spacing: 2px;
    z-index: 5;
    animation: blink 2s ease infinite;
}

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

@keyframes blink {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.8; }
}

/* --- Main Menu --- */
#menu-scene {
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.menu-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.game-title {
    text-align: center;
    animation: titleIn 1.2s ease;
}

.title-main {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 900;
    color: #fff;
    letter-spacing: 0.15em;
    text-shadow: 0 0 40px var(--cyan-glow), 0 0 80px var(--cyan-dim);
    line-height: 1.1;
}

.title-sub {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(0.75rem, 2vw, 1.1rem);
    font-weight: 400;
    color: var(--cyan);
    letter-spacing: 0.6em;
    margin-top: 0.5rem;
    opacity: 0.7;
}

@keyframes titleIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

/* --- Sci-Fi Button --- */
.sci-fi-btn {
    position: relative;
    display: block;
    width: 280px;
    padding: 0.85rem 2rem;
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--cyan);
    background: transparent;
    border: 1px solid var(--cyan-dim);
    cursor: pointer;
    overflow: hidden;
    transition: all 0.3s ease;
}

.sci-fi-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, var(--cyan-dim), transparent);
    transform: translateX(-100%);
    transition: transform 0.5s ease;
}

.sci-fi-btn:hover {
    color: #fff;
    border-color: var(--cyan);
    box-shadow: 0 0 20px var(--cyan-dim), inset 0 0 20px var(--cyan-dim);
    text-shadow: 0 0 10px var(--cyan);
}

.sci-fi-btn:hover::before {
    transform: translateX(100%);
}

.sci-fi-btn:active {
    transform: scale(0.97);
}
.sci-fi-btn.primary {
    border-color: var(--cyan);
    color: #fff;
    background: rgba(0, 206, 209, 0.12);
}
.sci-fi-btn.primary:hover {
    background: rgba(0, 206, 209, 0.25);
    box-shadow: 0 0 15px var(--cyan-dim);
}

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    animation: fadeUp 0.8s ease 0.3s both;
}

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

.menu-footer {
    display: flex;
    gap: 2rem;
    font-size: 0.75rem;
    color: var(--text-dim);
    letter-spacing: 2px;
    font-family: var(--font-display);
    animation: fadeUp 0.8s ease 0.6s both;
}

/* --- Hangar Scene --- */
#hangar-scene {
    align-items: center;
    justify-content: center;
}

.hangar-content {
    position: relative;
    z-index: 2;
    width: 90%;
    max-width: 600px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.scene-title {
    font-family: var(--font-display);
    font-size: clamp(1.2rem, 3vw, 1.6rem);
    font-weight: 700;
    color: var(--cyan);
    letter-spacing: 0.3em;
    text-align: center;
    margin-bottom: 1.5rem;
    text-shadow: 0 0 20px var(--cyan-dim);
}

/* --- New Hangar UI --- */
.hangar-ship-display {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.2rem;
    width: 100%;
    justify-content: center;
}

.arrow-btn {
    width: 40px;
    height: 40px;
    border: 1px solid var(--cyan-dim);
    background: rgba(0, 206, 209, 0.08);
    color: var(--cyan);
    font-size: 1.1rem;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}
.arrow-btn:hover {
    background: rgba(0, 206, 209, 0.2);
    border-color: var(--cyan);
    box-shadow: 0 0 12px var(--cyan-dim);
}

.hangar-ship-view {
    width: 260px;
    height: 260px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hangar-main-canvas {
    width: 220px;
    height: 220px;
    display: block;
}

.ship-name-plate {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--font-display);
    font-size: 0.9rem;
    color: var(--cyan);
    letter-spacing: 0.15em;
    white-space: nowrap;
    text-shadow: 0 0 10px var(--cyan-dim);
}

.hangar-stats-panel {
    width: 100%;
    max-width: 360px;
    background: rgba(5, 10, 20, 0.7);
    border: 1px solid #ffffff15;
    padding: 1rem 1.2rem;
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.hstat {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.hstat-label {
    font-size: 0.75rem;
    color: var(--text-dim);
    width: 2.5em;
    text-align: right;
    font-family: var(--font-display);
}

.hstat-bar {
    flex: 1;
    height: 6px;
    background: #ffffff12;
    border-radius: 3px;
    overflow: hidden;
}

.hstat-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--cyan), var(--green));
    border-radius: 3px;
    transition: width 0.4s ease;
}

.hangar-desc {
    font-size: 0.75rem;
    color: var(--text-dim);
    text-align: center;
    margin-top: 0.3rem;
    line-height: 1.5;
}

.hangar-buttons {
    display: flex;
    gap: 1rem;
}

/* --- Game Scene --- */
#game-scene { cursor: none; }

.hud {
    position: absolute;
    inset: 0;
    z-index: 5;
    pointer-events: none;
    padding: 1rem 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.hud-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
}

.hud-score, .hud-level, .hud-credits {
    font-family: var(--font-display);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hud-score .label,
.hud-level .label,
.hud-credits .label {
    font-size: 0.6rem;
    letter-spacing: 0.2em;
    color: var(--text-dim);
    text-transform: uppercase;
}

.hud-score .value,
.hud-level .value,
.hud-credits .value {
    font-size: 1.4rem;
    font-weight: 900;
    color: #fff;
    text-shadow: 0 0 10px var(--cyan-dim);
}

.hud-bottom {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    max-width: 300px;
}

.hud-hp, .hud-energy {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.hud-hp .label, .hud-energy .label {
    font-family: var(--font-display);
    font-size: 0.6rem;
    letter-spacing: 0.15em;
    color: var(--text-dim);
    width: 3em;
}

.hp-bar, .energy-bar {
    flex: 1;
    height: 6px;
    background: #ffffff10;
    border: 1px solid #ffffff08;
    overflow: hidden;
}

#hud-hp-bar {
    height: 100%;
    width: 100%;
    background: linear-gradient(90deg, var(--cyan), var(--green));
    transition: width 0.3s ease;
    box-shadow: 0 0 8px var(--cyan-dim);
}

#hud-energy-bar {
    height: 100%;
    width: 100%;
    background: linear-gradient(90deg, #4400ff, var(--purple));
    transition: width 0.3s ease;
    box-shadow: 0 0 8px #4400ff88;
}

/* --- Upgrade Panel --- */
.upgrade-panel {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 20;
    background: var(--bg-panel);
    backdrop-filter: blur(20px);
    border: 1px solid var(--cyan-dim);
    padding: 2rem;
    min-width: 320px;
    display: none;
    animation: panelIn 0.3s ease;
}

.upgrade-panel.active { display: block; }

@keyframes panelIn {
    from { opacity: 0; transform: translate(-50%, -50%) scale(0.9); }
    to { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

.upgrade-panel h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    color: var(--cyan);
    letter-spacing: 0.3em;
    text-align: center;
    margin-bottom: 1.5rem;
}

.upgrade-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 0;
    border-bottom: 1px solid #ffffff08;
    font-size: 0.85rem;
}

.upgrade-item .cost {
    color: var(--gold);
    font-family: var(--font-display);
    font-size: 0.75rem;
    margin: 0 1rem;
}

.upgrade-btn {
    font-family: var(--font-display);
    font-size: 0.65rem;
    padding: 0.35rem 0.8rem;
    color: var(--cyan);
    background: transparent;
    border: 1px solid var(--cyan-dim);
    cursor: pointer;
    pointer-events: all;
    transition: all 0.2s;
    letter-spacing: 0.1em;
}

.upgrade-btn:hover {
    background: var(--cyan-dim);
    color: #fff;
}

.upgrade-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.upgrade-panel .sci-fi-btn {
    margin-top: 1.5rem;
    width: 100%;
    pointer-events: all;
}

/* --- Message Area --- */
.message-area {
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    z-index: 15;
    text-align: center;
    pointer-events: none;
}

.message-area .msg {
    font-family: var(--font-display);
    font-size: 1.2rem;
    color: var(--cyan);
    letter-spacing: 0.2em;
    text-shadow: 0 0 20px var(--cyan-glow);
    animation: msgIn 0.5s ease, msgOut 0.5s ease 2s forwards;
}

@keyframes msgIn {
    from { opacity: 0; transform: scale(1.2); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes msgOut {
    to { opacity: 0; transform: translateY(-20px); }
}

/* --- Game Over Scene --- */
#gameover-scene {
    align-items: center;
    justify-content: center;
}

.gameover-content {
    position: relative;
    z-index: 2;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

#gameover-title {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 5vw, 2.5rem);
    color: var(--red);
    text-shadow: 0 0 30px var(--red-dim);
    letter-spacing: 0.2em;
}

#gameover-title.victory {
    color: var(--gold);
    text-shadow: 0 0 30px #ffd70066;
}

.gameover-stats {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    min-width: 260px;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 1rem;
    border-bottom: 1px solid #ffffff08;
    font-size: 0.9rem;
}

.stat-row span:last-child {
    font-family: var(--font-display);
    color: var(--cyan);
    font-weight: 700;
}

.gameover-content .sci-fi-btn {
    width: 240px;
}

/* --- Level Up Scene --- */
#levelup-scene {
    align-items: center;
    justify-content: center;
    background: #000c;
    animation: flashIn 0.3s ease;
}

@keyframes flashIn {
    0% { background: #fff; }
    100% { background: #000c; }
}

.levelup-content {
    text-align: center;
    z-index: 2;
    position: relative;
    animation: scaleIn 0.5s ease;
}

@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.5); }
    to { opacity: 1; transform: scale(1); }
}

.levelup-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 6vw, 3.5rem);
    font-weight: 900;
    color: #fff;
    letter-spacing: 0.3em;
    text-shadow: 0 0 40px var(--cyan-glow), 0 0 80px var(--cyan-dim);
    margin-bottom: 1rem;
}

.levelup-desc {
    font-size: 1.1rem;
    color: var(--text-dim);
    max-width: 500px;
    line-height: 1.6;
}

/* --- Settings Overlay --- */
.settings-overlay {
    position: absolute;
    inset: 0;
    z-index: 30;
    background: #000a;
    display: none;
    align-items: center;
    justify-content: center;
}
.settings-overlay.active { display: flex; }

.settings-panel {
    background: var(--bg-panel);
    border: 1px solid var(--cyan-dim);
    padding: 2rem;
    min-width: 300px;
}

.settings-panel h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    color: var(--cyan);
    letter-spacing: 0.3em;
    margin-bottom: 1.5rem;
    text-align: center;
}

.setting-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.6rem 0;
    border-bottom: 1px solid #ffffff08;
    font-size: 0.85rem;
}

.setting-row input[type="range"] {
    width: 120px;
    accent-color: var(--cyan);
}

/* --- Scanline overlay --- */
#game-wrapper::after {
    content: '';
    position: fixed;
    inset: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0,0,0,0.03) 2px,
        rgba(0,0,0,0.03) 4px
    );
    pointer-events: none;
    z-index: 100;
}

/* --- Touch Controls --- */
.touch-controls {
    position: absolute;
    bottom: 1rem;
    left: 0;
    right: 0;
    z-index: 15;
    display: none;
    justify-content: space-between;
    padding: 0 1rem;
    pointer-events: none;
}

@media (hover: none) and (pointer: coarse) {
    .touch-controls { display: flex; }
    #game-scene { cursor: default; }
}

.touch-fire {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    border: 2px solid var(--red-dim);
    background: var(--red-dim);
    color: var(--red);
    font-family: var(--font-display);
    font-size: 0.6rem;
    letter-spacing: 0.1em;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: all;
}

.touch-special {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 2px solid var(--purple);
    background: #aa44ff22;
    color: var(--purple);
    font-family: var(--font-display);
    font-size: 0.55rem;
    letter-spacing: 0.1em;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: all;
}