:root {
    --bg-dark-blue: #0d1117;
    --bg-gradient-start: #010409;
    --bg-gradient-end: #0d1117;
    --card-bg: rgba(22, 27, 34, 0.5);
    --card-border: rgba(139, 148, 158, 0.2);
    --text-primary: #e6edf3;
    --text-secondary: #7d8590;
    --accent-cyan: #30b6c4;
    --accent-glow: rgba(48, 182, 196, 0.5);
    --font-main: 'Inter', sans-serif;
}

body {
    font-family: var(--font-main);
    color: var(--text-primary);
    background: linear-gradient(180deg, var(--bg-gradient-start), var(--bg-gradient-end));
    overflow-x: hidden;
}

#stars-container {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: -1; overflow: hidden;
}

.star {
    position: absolute; background-color: white; border-radius: 50%; animation: twinkle 5s infinite ease-in-out;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.5; transform: scale(0.8); }
    50% { opacity: 1; transform: scale(1.2); }
}

main {
    animation: main-fade-in 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

@keyframes main-fade-in {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

.app-title {
    font-size: 2.5rem; font-weight: 900; color: white; letter-spacing: -0.05em; text-shadow: 0 0 15px var(--accent-glow);
}

.subtitle-text {
    font-size: 1.125rem; color: var(--text-secondary); transition: color 0.3s;
}

.app-nav {
    display: flex; justify-content: center; background-color: var(--card-bg); border: 1px solid var(--card-border); border-radius: 9999px; padding: 0.5rem; max-width: 350px; margin: 1rem auto 0;
}
.nav-link {
    flex: 1; text-align: center; padding: 0.5rem 1rem; color: var(--text-secondary); font-weight: 700; text-decoration: none; border-radius: 9999px; transition: all 0.3s ease;
}
.nav-link.active {
    background-color: var(--accent-cyan); color: var(--bg-dark-blue); box-shadow: 0 0 15px var(--accent-glow);
}
.nav-link:not(.active):hover {
    background-color: rgba(255, 255, 255, 0.1); color: var(--text-primary);
}

.control-button-secondary {
    background: none; border: none; color: var(--accent-cyan); font-weight: 700; cursor: pointer; transition: all 0.2s ease;
}
.control-button-secondary:hover {
    text-decoration: underline; filter: brightness(1.2);
}

.column-title {
    font-size: 1.25rem; font-weight: 700; color: white; text-align: center;
}

.delay-input-wrapper {
    display: flex; justify-content: center; align-items: center; gap: 0.5rem; color: var(--text-secondary);
}

.delay-input {
    width: 60px; text-align: center; background: var(--card-bg); border: 1px solid var(--card-border); color: var(--text-primary); border-radius: 0.375rem; padding: 0.25rem; font-size: 1.1rem; transition: all 0.3s ease;
}
.delay-input:focus {
    outline: none; border-color: var(--accent-cyan); box-shadow: 0 0 10px var(--accent-glow);
}

.date-input {
    background: var(--card-bg); border: 1px solid var(--card-border); color: var(--text-primary); border-radius: 0.5rem; padding: 0.5rem 1rem; font-size: 1.1rem; font-weight: 700; text-align: center; color-scheme: dark;
}
.date-input:focus {
    outline: none; border-color: var(--accent-cyan); box-shadow: 0 0 10px var(--accent-glow);
}
.time-selectors-inline {
    display: flex; justify-content: center; align-items: center; gap: 0.5rem; font-size: 1.5rem; font-weight: 700; color: var(--accent-cyan);
}
.time-selectors-inline select {
    background: var(--card-bg); border: 1px solid var(--card-border); color: var(--text-primary); border-radius: 0.5rem; padding: 0.5rem; font-size: 1.25rem; font-weight: 700; -webkit-appearance: none; appearance: none; text-align: center;
}
.time-selectors-inline select:focus {
    outline: none; border-color: var(--accent-cyan);
}

.results-grid {
    display: grid; grid-template-columns: 1fr; gap: 1rem;
}

.results-column {
    display: flex; flex-direction: column; gap: 0.75rem;
}

.result-card {
    background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 0.75rem; padding: 1rem; position: relative; overflow: hidden; transition: transform 0.3s ease; opacity: 0; transform: perspective(800px) translateY(30px) rotateX(-10deg); animation: cardFadeIn 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

.result-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(transparent, var(--glow-color, transparent), transparent 30%);
    animation: rotate 4s linear infinite;
    opacity: 0.6;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes cardFadeIn {
    to { opacity: 1; transform: perspective(800px) translateY(0) rotateX(0); }
}

.result-card:hover { transform: translateY(-5px) scale(1.02); }

.card-content {
    position: relative;
    /* z-index: 2; <-- ESTE ERA EL ERROR, SE HA ELIMINADO */
    background: var(--bg-dark-blue);
    border-radius: 0.6rem;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.glow-poor { --glow-color: #ef4444; }
.glow-acceptable { --glow-color: #f59e0b; }
.glow-optimal { --glow-color: #22c55e; }

.app-footer {
    text-align: center; margin-top: 3rem; color: var(--text-secondary); font-size: 0.875rem; opacity: 0.7;
}

.modal-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.7); backdrop-filter: blur(8px); display: flex; align-items: center; justify-content: center; z-index: 50; opacity: 0; transition: opacity 0.4s ease; pointer-events: none;
}
.modal-overlay:not(.hidden) {
    opacity: 1; pointer-events: auto;
}

.modal-content {
    background: #161b22; border: 1px solid var(--card-border); border-radius: 1rem; padding: 2rem; width: 90%; max-width: 400px; box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5); transform: translateY(20px) scale(0.95); transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.modal-overlay:not(.hidden) .modal-content {
    transform: translateY(0) scale(1);
}

.modal-title {
    font-size: 1.5rem; font-weight: 700; text-align: center; margin-bottom: 1.5rem;
}

.time-selectors {
    display: flex; justify-content: space-between; gap: 1rem; margin-bottom: 2rem;
}

.time-selector {
    display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
}
.time-selector label {
    font-size: 0.875rem; color: var(--text-secondary);
}
.time-selector select {
    background: var(--bg-dark-blue); border: 1px solid var(--card-border); color: var(--text-primary); border-radius: 0.5rem; padding: 0.5rem 1rem; font-size: 1.25rem; -webkit-appearance: none; appearance: none; text-align: center;
}

.modal-actions {
    display: flex; gap: 1rem; margin-top: 1.5rem;
}

.modal-button {
    flex-grow: 1; padding: 0.75rem; border-radius: 0.5rem; border: none; font-weight: 700; cursor: pointer; transition: all 0.2s ease;
}
.modal-button.primary {
    background: var(--accent-cyan); color: var(--bg-dark-blue);
}
.modal-button.secondary {
    background: var(--card-bg); color: var(--text-primary);
}
.modal-button:hover {
    transform: translateY(-2px);
}

.info-button {
    background: transparent; border: none; color: var(--text-secondary); cursor: pointer; padding: 0.25rem; border-radius: 50%; transition: all 0.3s ease; flex-shrink: 0;
}
.info-button:hover {
    color: var(--text-primary); background-color: rgba(255, 255, 255, 0.1); transform: scale(1.1);
}

.info-modal-text {
    color: var(--text-secondary); line-height: 1.6; text-align: center;
}

.hidden { display: none; }