/* ======================== */
/* Calculator Styles        */
/* ======================== */

/* Import main.css */
@import './main.css';

.calculator {
    background-color: var(--calculator-bg);
    border-radius: var(--apple-radius);
    padding: 24px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    animation: calculatorFloat 0.6s var(--calculator-bounce);
    transform: translateY(0) scale(1);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    border: 0.5px solid var(--border-color);
    -webkit-backdrop-filter: blur(var(--apple-blur));
    backdrop-filter: blur(var(--apple-blur));
}

.calculator:hover {
    transform: translateY(-5px) scale(1.01);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.display-container {
    background-color: var(--display-bg);
    border-radius: var(--button-radius);
    padding: 20px;
    margin-bottom: 24px;
    animation: fadeInScale 0.5s ease-out;
    transform-origin: top;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border: 0.5px solid var(--border-color);
}

#display {
    width: 100%;
    border: none;
    background: transparent;
    color: var(--text-color);
    font-size: 2.2em;
    text-align: right;
    outline: none;
    transition: all var(--animation-speed);
    font-family: 'SF Mono', 'Menlo', 'Monaco', 'Courier New', monospace;
    font-weight: 300;
    letter-spacing: -0.5px;
}

#display.scientific-notation {
    font-size: 1.8em;
}

#history {
    color: var(--text-color);
    opacity: 0.6;
    text-align: right;
    min-height: 20px;
    margin-bottom: 8px;
    font-size: 0.9em;
    font-weight: 300;
    transition: opacity 0.3s ease;
}

.buttons-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

/* Button styles - Apple style */
button {
    position: relative;
    overflow: hidden;
    border: none;
    border-radius: var(--button-radius);
    padding: 16px;
    font-size: 1.1em;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s var(--button-spring);
    background-color: var(--btn-bg);
    color: var(--btn-color);
    transform-origin: center;
    -webkit-backdrop-filter: blur(5px);
    backdrop-filter: blur(5px);
    box-shadow: 0 1px 2px var(--button-shadow);
    border: 0.5px solid var(--border-color);
    -webkit-user-select: none;
    -moz-user-select: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

button:hover {
    background-color: var(--btn-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--button-shadow);
}

button:active {
    transform: scale(0.96);
    box-shadow: 0 1px 1px var(--button-shadow);
    filter: brightness(0.98);
}

/* Button variants */
.operator {
    background-color: var(--operator-bg);
    color: var(--operator-color);
    font-weight: 600;
}

.equals {
    background-color: var(--equals-bg);
    color: var(--equals-color);
    grid-column: span 2;
    font-weight: 600;
}

.memory, .scientific {
    background-color: var(--scientific-bg);
    font-size: 0.9em;
    color: var(--operator-color);
    font-weight: 500;
}

.clear {
    font-weight: 500;
}

.zero {
    grid-column: span 2;
}

.number {
    font-weight: 400;
}

/* Ripple effect */
.ripple {
    position: absolute;
    background: var(--ripple-color);
    transform: translate(-50%, -50%);
    pointer-events: none;
    border-radius: 50%;
    animation: rippleEffect var(--ripple-duration) linear;
    opacity: 0;
}

/* Theme switch */
.theme-switch {
    position: fixed;
    top: 20px;
    right: 20px;
    animation: fadeInRotate 0.6s ease-out;
    z-index: 10;
}

.theme-label {
    cursor: pointer;
    padding: 12px 16px;
    border-radius: 25px;
    background-color: var(--calculator-bg);
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
    -webkit-backdrop-filter: blur(var(--apple-blur));
    backdrop-filter: blur(var(--apple-blur));
    box-shadow: 0 4px 12px var(--shadow-color);
    border: 0.5px solid var(--border-color);
    transition: all 0.3s ease;
}

.theme-label:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px var(--shadow-color);
}

#theme-toggle {
    display: none;
}

.sun, .moon {
    font-size: 1.2em;
}

/* Credits */
.credits {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--calculator-bg);
    color: var(--text-color);
    padding: 10px 20px;
    border-radius: 20px;
    box-shadow: 0 4px 12px var(--shadow-color);
    opacity: 0;
    animation: creditsSlideUp 0.5s ease-out 0.8s forwards;
    font-size: 0.9em;
    letter-spacing: 0.2px;
    transition: all 0.3s var(--button-spring);
    -webkit-backdrop-filter: blur(var(--apple-blur));
    backdrop-filter: blur(var(--apple-blur));
    border: 0.5px solid var(--border-color);
}

.credits:hover {
    transform: translateX(-50%) translateY(-3px);
    box-shadow: 0 8px 20px var(--shadow-color);
}

/* Loading overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s;
    -webkit-backdrop-filter: blur(var(--apple-blur));
    backdrop-filter: blur(var(--apple-blur));
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--loading-spinner-color);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Animation definitions */
@keyframes scientificPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

@keyframes rippleEffect {
    0% {
        width: 0;
        height: 0;
        opacity: 0.3;
    }
    100% {
        width: 500px;
        height: 500px;
        opacity: 0;
    }
}

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

@keyframes calculatorFloat {
    0% {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes creditsSlideUp {
    0% {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }
    100% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.98);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes fadeInRotate {
    from {
        opacity: 0;
        transform: rotate(-90deg);
    }
    to {
        opacity: 1;
        transform: rotate(0);
    }
}