@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700&display=swap');

:root {
    /* Theme Colors (Dark Theme Palette) */
    --bg-primary: #080710;
    --card-bg: rgba(255, 255, 255, 0.05);
    --border-color: rgba(255, 255, 255, 0.1);
    --border-hover: rgba(255, 255, 255, 0.2);
    
    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    
    /* Brand Accent Colors */
    --accent-glow: rgba(99, 102, 241, 0.2);
    --btn-number-bg: rgba(255, 255, 255, 0.05);
    --btn-number-hover: rgba(255, 255, 255, 0.12);
    --btn-operator-bg: rgba(99, 102, 241, 0.15);
    --btn-operator-hover: rgba(99, 102, 241, 0.3);
    --btn-accent-bg: #4f46e5;
    --btn-accent-hover: #6366f1;
    --btn-danger-bg: rgba(239, 68, 68, 0.15);
    --btn-danger-hover: rgba(239, 68, 68, 0.3);
    
    /* Scientific Key Accents */
    --btn-sci-bg: rgba(14, 116, 144, 0.15);
    --btn-sci-hover: rgba(14, 116, 144, 0.35);
    --btn-sci-text: #38bdf8;
    
    /* Animation & Transitions */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Plus Jakarta Sans', sans-serif;
}

body {
    background: radial-gradient(circle at 50% 50%, #17153b 0%, #03001e 100%);
    background-attachment: fixed;
    min-height: 100vh;
    color: var(--text-primary);
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
}

/* Background Animated Blobs */
body::before, body::after {
    content: '';
    position: absolute;
    width: 45vw;
    height: 45vw;
    max-width: 600px;
    max-height: 600px;
    border-radius: 50%;
    filter: blur(120px);
    z-index: -1;
    opacity: 0.3;
    pointer-events: none;
    animation: pulse 12s infinite alternate ease-in-out;
}

body::before {
    background: #4f46e5;
    top: 10%;
    left: -10%;
}

body::after {
    background: #06b6d4;
    bottom: 10%;
    right: -10%;
    animation-delay: 6s;
}

@keyframes pulse {
    0% { transform: translate(0, 0) scale(1) rotate(0deg); }
    100% { transform: translate(5vw, 5vh) scale(1.2) rotate(180deg); }
}

/* Base Layout Container */
.Contenedor {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 100vh;
}

/* Header Styling with glassmorphism and subtle glowing bottom border */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2.5rem;
    background: rgba(15, 23, 42, 0.2);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
    position: sticky;
    top: 0;
    z-index: 10;
}

header .Logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
}

header .Logo img {
    height: 38px;
    width: auto;
    filter: drop-shadow(0 0 10px rgba(99, 102, 241, 0.6));
    transition: transform var(--transition-normal) ease;
}

header .Logo:hover img {
    transform: rotate(15deg) scale(1.1);
}

header .brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

header .Logo h1 {
    font-size: 1.3rem;
    font-weight: 800;
    background: linear-gradient(135deg, #ffffff 0%, #a5b4fc 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 0.05em;
}

header .sub-brand {
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    color: #38bdf8;
    text-transform: uppercase;
}

header .Header-Right {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

header .status-badge {
    background: rgba(56, 189, 248, 0.08);
    border: 1px solid rgba(56, 189, 248, 0.2);
    padding: 0.3rem 0.8rem;
    border-radius: 9999px;
    font-size: 0.7rem;
    font-weight: 700;
    color: #38bdf8;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    box-shadow: 0 0 10px rgba(56, 189, 248, 0.05);
}

header .Redes a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    text-decoration: none;
}

header .Redes a i {
    font-size: 1.2rem;
}

header .Redes a:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--border-hover);
    transform: translateY(-2px);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.4);
}

/* Main Area - Calculator Wrapper */
.Calculadoras {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2.5rem 1.5rem;
}

/* Calculator Container */
.calculator-card {
    background: rgba(10, 10, 15, 0.45);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 28px;
    width: 100%;
    max-width: 400px;
    padding: 1.75rem;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.6), 
                inset 0 1px 1px rgba(255, 255, 255, 0.1);
    transition: max-width var(--transition-slow) cubic-bezier(0.19, 1, 0.22, 1);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* When scientific mode is active, make the card wider */
.calculator-card.mode-scientific {
    max-width: 720px;
}

/* Mode Switcher Header inside Card */
.mode-selector {
    display: flex;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 4px;
    position: relative;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.4);
}

.mode-btn {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0.6rem 1rem;
    cursor: pointer;
    z-index: 2;
    transition: color var(--transition-fast);
    text-align: center;
}

.mode-btn.active {
    color: var(--text-primary);
}

.mode-highlight {
    position: absolute;
    top: 4px;
    bottom: 4px;
    left: 4px;
    width: calc(50% - 4px);
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.4) 0%, rgba(99, 102, 241, 0.4) 100%);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 10px;
    z-index: 1;
    transition: transform var(--transition-normal) cubic-bezier(0.19, 1, 0.22, 1);
}

/* Slide the switcher highlight to the right */
.calculator-card.mode-scientific .mode-highlight {
    transform: translateX(100%);
}

/* Screen Display */
.display-container {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 1.25rem 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: flex-end;
    min-height: 125px;
    word-break: break-all;
    box-shadow: inset 0 4px 10px rgba(0, 0, 0, 0.3);
}

.display-history {
    font-size: 0.95rem;
    color: var(--text-secondary);
    min-height: 1.5em;
    margin-bottom: 0.35rem;
    letter-spacing: 0.05em;
    transition: var(--transition-fast);
    opacity: 0.8;
}

.display-input {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    width: 100%;
    border: none;
    background: none;
    text-align: right;
    outline: none;
    caret-color: var(--btn-accent-hover);
    padding: 0;
}

/* Grid Layout container holding Scientific and Standard panels */
.calculator-layout {
    display: grid;
    grid-template-columns: 1fr;
    transition: all var(--transition-slow) cubic-bezier(0.19, 1, 0.22, 1);
}

.calculator-card.mode-scientific .calculator-layout {
    grid-template-columns: 1.2fr 1fr;
    gap: 1rem;
}

/* Keypad Panels */
.panel-scientific {
    display: none;
}

/* When active, show the scientific panel */
.calculator-card.mode-scientific .panel-scientific {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: 1fr;
    gap: 0.6rem;
    animation: slideIn var(--transition-normal) forwards;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-15px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

.panel-standard {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: 1fr;
    gap: 0.6rem;
    width: 100%;
}

/* Style for Calculator Buttons with responsive height aspect */
.calc-btn {
    border: 1px solid var(--border-color);
    border-radius: 14px;
    height: clamp(44px, 5.5vh, 56px);
    font-size: 1.15rem;
    font-weight: 600;
    cursor: pointer;
    color: var(--text-primary);
    background: var(--btn-number-bg);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.calc-btn:hover {
    background: var(--btn-number-hover);
    border-color: var(--border-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.05);
}

.calc-btn:active {
    transform: translateY(1px) scale(0.96);
}

/* Modifier buttons styling */
.calc-btn.btn-operator {
    background: var(--btn-operator-bg);
    color: #a5b4fc;
    font-size: 1.3rem;
    border-color: rgba(99, 102, 241, 0.2);
}
.calc-btn.btn-operator:hover {
    background: var(--btn-operator-hover);
    border-color: rgba(99, 102, 241, 0.4);
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.2);
}

.calc-btn.btn-accent {
    background: var(--btn-accent-bg);
    border-color: var(--btn-accent-hover);
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.4);
}
.calc-btn.btn-accent:hover {
    background: var(--btn-accent-hover);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
}

.calc-btn.btn-danger {
    background: var(--btn-danger-bg);
    color: #f87171;
    border-color: rgba(239, 68, 68, 0.2);
}
.calc-btn.btn-danger:hover {
    background: var(--btn-danger-hover);
    border-color: rgba(239, 68, 68, 0.4);
    box-shadow: 0 0 10px rgba(239, 68, 68, 0.2);
}

.calc-btn.btn-scientific {
    background: var(--btn-sci-bg);
    color: var(--btn-sci-text);
    font-size: 1rem;
    border-color: rgba(14, 116, 144, 0.2);
}
.calc-btn.btn-scientific:hover {
    background: var(--btn-sci-hover);
    border-color: rgba(14, 116, 144, 0.4);
    box-shadow: 0 0 10px rgba(14, 116, 144, 0.25);
}

/* Custom Spans & Spacers */
.calc-btn.span-2 {
    grid-column: span 2;
}

.calc-btn.row-span-2 {
    grid-row: span 2;
    height: 100%;
}

/* Footer Section with glassy layout and pulsing animation on text hover */
footer {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1.25rem 0;
    background: rgba(15, 23, 42, 0.25);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: var(--text-secondary);
    box-shadow: 0 -4px 30px rgba(0, 0, 0, 0.3);
}

.footer-content {
    width: 100%;
    max-width: 1200px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2.5rem;
}

footer a {
    color: #a5b4fc;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-fast);
    display: inline-block;
}

footer a:hover {
    color: #ffffff;
    text-shadow: 0 0 10px rgba(165, 180, 252, 0.8);
    transform: scale(1.05);
}

.footer-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    padding: 0.3rem 0.7rem;
    border-radius: 8px;
    letter-spacing: 0.02em;
}

.footer-tag i {
    color: #6366f1;
}

.footer-separator {
    color: var(--border-color);
    margin: 0 0.25rem;
}

/* Media Queries for Mobile responsiveness */
@media (max-width: 650px) {
    header {
        padding: 1rem 1.5rem;
    }
    
    header .Logo h1 {
        font-size: 1.2rem;
    }

    .Calculadoras {
        padding: 1.5rem 1rem;
    }

    .calculator-card {
        padding: 1.25rem;
        gap: 1.25rem;
        max-width: 360px;
    }

    .calculator-card.mode-scientific {
        max-width: 360px;
    }

    /* Stack scientific panel on top or bottom of standard panel on mobile */
    .calculator-card.mode-scientific .calculator-layout {
        grid-template-columns: 1fr;
        gap: 0.8rem;
    }

    .calculator-card.mode-scientific .panel-scientific {
        grid-template-columns: repeat(4, 1fr);
        grid-auto-rows: 1fr;
        gap: 0.5rem;
    }

    .calc-btn {
        height: 46px;
        font-size: 1.1rem;
        border-radius: 10px;
    }

    .footer-content {
        flex-direction: column;
        gap: 0.75rem;
        padding: 0 1rem;
        text-align: center;
    }
}

@media (max-width: 380px) {
    header .Logo h1 {
        display: none; /* Hide brand name on extremely narrow viewports */
    }

    header {
        padding: 0.75rem 1rem;
    }

    .calculator-card {
        padding: 1rem;
        gap: 1rem;
    }
    
    .calc-btn {
        height: 42px;
        font-size: 1rem;
    }
}