/* ================================================
   COSMIC ECHOES - Main Stylesheet
   Pure CSS with Tailwind utility classes
   ================================================ */

/* ------------------------------------------------
   CSS Custom Properties (Design Tokens)
   ------------------------------------------------ */
:root {
    --cosmic-dark: #1A1A2E;
    --cosmic-darker: #16213E;
    --white-10: rgba(255, 255, 255, 0.1);
    --white-20: rgba(255, 255, 255, 0.2);
    --radius: 0.5rem;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--cosmic-dark);
    color: white;
    line-height: 1.6;
}

/* ------------------------------------------------
   Button Styles
   ------------------------------------------------ */
.btn-primary {
    background-color: var(--white-10);
    color: white;
    border: 1px solid var(--white-20);
    padding: 0.75rem 2rem;
    font-size: 1.125rem;
    border-radius: 9999px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-primary:hover {
    background-color: var(--white-20);
    box-shadow: 0 0 20px 8px rgba(255, 255, 255, 0.15);
}

.btn-ghost {
    background: transparent;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    border: none;
    font-size: 0.875rem;
}

.btn-ghost:hover {
    background-color: var(--white-10);
}

.btn-secondary {
    background-color: var(--white-10);
    color: white;
    border: 1px solid var(--white-20);
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn-secondary:hover {
    background-color: var(--white-20);
    box-shadow: 0 0 15px 5px rgba(255, 255, 255, 0.1);
}

.btn-outline {
    background: transparent;
    color: white;
    border: 1px solid var(--white-10);
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn-outline:hover {
    background-color: var(--white-10);
}

/* ------------------------------------------------
   Card Styles
   ------------------------------------------------ */
.card {
    background-color: rgba(26, 26, 46, 0.6);
    border: 1px solid var(--white-10);
    border-radius: var(--radius);
    box-shadow: 0 0 15px 5px rgba(255, 255, 255, 0.1);
}

/* ------------------------------------------------
   Input Styles
   ------------------------------------------------ */
.input-field {
    background-color: var(--cosmic-darker);
    border: 1px solid var(--white-10);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s ease;
}

.input-field:focus {
    border-color: rgba(255, 255, 255, 0.3);
}

/* Date input specific styling */
input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(1);
    cursor: pointer;
}

/* ------------------------------------------------
   Stars Background
   ------------------------------------------------ */
.stars-container {
    background-image: 
        radial-gradient(2px 2px at 20px 30px, white, rgba(0, 0, 0, 0)),
        radial-gradient(2px 2px at 40px 70px, white, rgba(0, 0, 0, 0)),
        radial-gradient(2px 2px at 50px 160px, white, rgba(0, 0, 0, 0)),
        radial-gradient(2px 2px at 90px 40px, white, rgba(0, 0, 0, 0)),
        radial-gradient(2px 2px at 130px 80px, white, rgba(0, 0, 0, 0)),
        radial-gradient(2px 2px at 160px 120px, white, rgba(0, 0, 0, 0)),
        radial-gradient(1px 1px at 180px 50px, white, rgba(0, 0, 0, 0)),
        radial-gradient(1px 1px at 10px 100px, white, rgba(0, 0, 0, 0)),
        radial-gradient(1px 1px at 70px 140px, white, rgba(0, 0, 0, 0)),
        radial-gradient(1px 1px at 120px 180px, white, rgba(0, 0, 0, 0));
    background-repeat: repeat;
    background-size: 200px 200px;
    animation: twinkle 4s ease-in-out infinite;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; }
}

/* ------------------------------------------------
   Gradient Radial (for moon glow)
   ------------------------------------------------ */
.bg-gradient-radial {
    background: radial-gradient(circle, rgba(255, 255, 255, 0.05), transparent, transparent);
}

/* ------------------------------------------------
   Underline Animation
   ------------------------------------------------ */
.underline-animation {
    position: relative;
}

.underline-animation::after {
    content: '';
    position: absolute;
    width: 0;
    height: 1px;
    bottom: -2px;
    left: 0;
    background-color: white;
    transition: width 0.3s ease;
}

.underline-animation:hover::after {
    width: 100%;
}

/* ------------------------------------------------
   Animations - Fade In
   ------------------------------------------------ */
.animate-fade-in {
    animation: fadeIn 1.5s ease-out forwards;
}

.animate-fade-in-delay {
    animation: fadeIn 1.5s ease-out 0.5s forwards;
    opacity: 0;
}

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

/* ------------------------------------------------
   Animations - Pulse Glow
   ------------------------------------------------ */
.animate-pulse-glow {
    animation: pulseGlow 4s ease-in-out infinite;
}

.animate-pulse-glow-delayed {
    animation: pulseGlowDelayed 4s ease-in-out infinite 1s;
}

@keyframes pulseGlow {
    0%, 100% { 
        opacity: 0.3; 
        transform: scale(1); 
    }
    50% { 
        opacity: 0.6; 
        transform: scale(1.05); 
    }
}

@keyframes pulseGlowDelayed {
    0%, 100% { 
        opacity: 0.2; 
        transform: scale(1); 
    }
    50% { 
        opacity: 0.4; 
        transform: scale(1.1); 
    }
}

/* ------------------------------------------------
   Animations - Float
   ------------------------------------------------ */
.animate-float {
    animation: float 6s ease-in-out infinite;
}

.animate-gentle-float {
    animation: gentleFloat 4s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { 
        transform: translateY(0px) rotate(0deg); 
    }
    50% { 
        transform: translateY(-10px) rotate(2deg); 
    }
}

@keyframes gentleFloat {
    0%, 100% { 
        transform: translateY(0px); 
    }
    50% { 
        transform: translateY(-5px); 
    }
}

/* ------------------------------------------------
   Animations - Pulse Slow
   ------------------------------------------------ */
.animate-pulse-slow {
    animation: pulseSlow 3s infinite;
}

.animate-pulse-slow-subtle {
    animation: pulseSlowSubtle 4s ease-in-out infinite;
}

@keyframes pulseSlow {
    0% { box-shadow: 0 0 15px 5px rgba(255, 255, 255, 0.1); }
    50% { box-shadow: 0 0 20px 8px rgba(255, 255, 255, 0.2); }
    100% { box-shadow: 0 0 15px 5px rgba(255, 255, 255, 0.1); }
}

@keyframes pulseSlowSubtle {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.6; }
}

/* ------------------------------------------------
   Moon Phase Card Hover Effects
   ------------------------------------------------ */
.moon-phase-card {
    transition: all 0.3s ease;
}

.moon-phase-card:hover {
    transform: scale(1.1);
}

.moon-phase-card:hover .moon-phase-image {
    box-shadow: 0 0 15px 5px rgba(255, 255, 255, 0.2);
}

.moon-phase-card:hover .moon-phase-name {
    color: white;
}

.moon-phase-image {
    box-shadow: 0 0 10px 2px rgba(255, 255, 255, 0.1);
    transition: box-shadow 0.3s ease;
}

.moon-phase-name {
    transition: color 0.3s ease;
}

/* ------------------------------------------------
   Shadow Glow Utility
   ------------------------------------------------ */
.shadow-glow {
    box-shadow: 0 0 15px 5px rgba(255, 255, 255, 0.1);
}

.shadow-glow-sm {
    box-shadow: 0 0 10px 2px rgba(255, 255, 255, 0.1);
}

/* ------------------------------------------------
   Loading Spinner
   ------------------------------------------------ */
@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.animate-spin {
    animation: spin 1s linear infinite;
}

/* ------------------------------------------------
   Utility: Hidden
   ------------------------------------------------ */
.hidden {
    display: none !important;
}

/* ------------------------------------------------
   Responsive Adjustments
   ------------------------------------------------ */
@media (max-width: 768px) {
    .btn-primary {
        padding: 0.625rem 1.5rem;
        font-size: 1rem;
    }
    
    h2 {
        font-size: 1.875rem;
    }
}