@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300..700&display=swap');

/* ==========================================================================
   MYBTC Calculator - Optimized Styles
   ========================================================================== */

/* --------------------------------------------------------------------------
   DESIGN TOKENS (Variables)
   -------------------------------------------------------------------------- */
:root {
    /* Colors - Brand */
    --color-primary: #fe0;
    /* Main Yellow */
    --color-primary-dark: #f90;
    /* Brand Orange */
    --color-primary-light: #fd0;
    /* Lighter Yellow for buttons/inputs */
    --color-accent: #fa0;
    /* Highlight Yellow */

    /* Colors - Actions */
    --color-success: #00b129;
    --color-success-hover: #009a22;
    --color-danger: #900;
    --color-danger-hover: #d00;
    --color-warning: #f80;
    --color-warning-hover: #f60;

    /* Colors - Neutral */
    --color-black: #000;
    --color-white: #fff;
    --color-gray-dark: #111;
    --color-gray-medium: #222;
    --color-gray-light: #ddd;
    --color-gray-dim: #333;

    /* Typography */
    --font-main: "Space Grotesk", sans-serif;

    /* Layers (Z-index) */
    --z-main: 1;
    --z-menu: 100;
    --z-overlay: 1000;
    --z-modal-content: 1001;

    /* Transitions */
    --transition-standard: 0.3s ease-out;

    /* Theme Colors (Defaults to Light) */
    --theme-bg-main: var(--color-primary);
    --theme-bg-secondary: var(--color-primary-light);
    --theme-bg-page: var(--color-black);
    --theme-text-main: var(--color-black);
    --theme-text-white: var(--color-white);
    --theme-active-btn: var(--color-primary-dark);
    --theme-active-btn-text: var(--color-white);
    --theme-status-pos: #090;
    --theme-status-neg: #f00;
    --theme-accent: var(--color-accent);
}

:root.dark-mode {
    --theme-bg-main: #1a1a1a;
    --theme-bg-secondary: #2a2a2a;
    --theme-bg-page: #000;
    --theme-text-main: #fff;
    --theme-text-white: #000;
    --theme-active-btn: #f50;
    --theme-active-btn-text: #fff;
    --theme-status-pos: #0c0;
    --theme-status-neg: #ff3333;
    --theme-accent: #ff3333;
    /* For icons/highlights */
}

/* --------------------------------------------------------------------------
   BASE STYLES & RESET
   -------------------------------------------------------------------------- */
body {
    margin: 0;
    padding: 25px;
    box-sizing: border-box;
    font-family: var(--font-main);
    background-color: var(--color-primary);
    overflow-x: hidden;
    min-height: 100vh;
}

*,
*::before,
*::after {
    box-sizing: inherit;
}

a {
    color: var(--color-black);
    text-decoration: none;
    transition: color 0.2s;
}

/* --------------------------------------------------------------------------
   LAYOUT
   -------------------------------------------------------------------------- */
.main-container {
    max-width: 620px;
    margin: 0 auto;
    background-color: var(--color-primary);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 81vh;
    transition: transform var(--transition-standard), padding-bottom var(--transition-standard);
    position: relative;
    z-index: var(--z-main);
    transform: translate3d(0, 0, 0);
    /* Hardware acceleration */
}

.slide-up {
    transform: translateY(-90px);
    padding-bottom: 90px;
}

.header {
    position: relative;
}

.footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
}

.info-container {
    margin-top: 35px;
}

.amount-container {
    margin-bottom: 30px;
}

/* --------------------------------------------------------------------------
   COMPONENTS - Header
   -------------------------------------------------------------------------- */
h1#mybtc-brand {
    font-size: 2.45rem;
    font-weight: 700;
    margin: 0;
}

h1#sugiro-logo {
    font-size: 0.8rem;
    font-weight: 500;
    position: absolute;
    left: 2px;
    top: -22px;
}

.mybtclogo {
    float: right;
    width: 54px;
    cursor: pointer;
    display: block;
}

.mybtclogo.spin {
    animation: spinEightTimes 1s ease-in-out;
}

.lang-btn-container {
    position: absolute;
    top: 10px;
    left: 145px;
}

/* --------------------------------------------------------------------------
   COMPONENTS - Buttons
   -------------------------------------------------------------------------- */
button {
    font-family: var(--font-main);
    cursor: pointer;
    border: none;
}

button.lang-btn {
    background-color: #fc0;
    color: var(--color-black);
    font-size: 0.9rem;
    font-weight: 800;
    border-radius: 3px;
    padding: 5px 12px;
}

button.lang-btn.active {
    background-color: var(--color-primary-dark);
    color: var(--color-white);
}

button.unit-btn {
    background-color: var(--color-primary-light);
    border-radius: 5px;
    padding: 6px 12px;
    color: var(--color-black);
    font-size: 0.9rem;
    font-weight: 500;
    min-width: 50px;
    text-align: center;
}

button.unit-btn.active {
    background-color: var(--color-primary-dark);
    color: var(--color-white);
    font-weight: 700;
}

.button-container {
    width: 100%;
    margin-top: auto;
    padding-top: 20px;
    display: flex;
    gap: 10px;
}

.button-container button {
    color: var(--color-white);
    font-size: 18px;
    font-weight: 500;
    line-height: 1;
    padding: 14px 0 16px;
    border-radius: 5px;
    flex: 1;
}

button#info {
    background-color: var(--color-success);
}

button#info:hover {
    background-color: var(--color-success-hover);
}

button#refresh {
    background-color: var(--color-warning);
}

button#refresh:hover {
    background-color: var(--color-warning-hover);
}

/* --------------------------------------------------------------------------
   COMPONENTS - Displays & Inputs
   -------------------------------------------------------------------------- */
.amount-display {
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 50px;
    font-weight: 500;
    background: var(--color-primary-light);
    padding: 7px 0;
    border-radius: 5px;
    min-height: 65px;
    text-align: center;
    cursor: pointer;
}

.amount-display .fiat-symbol {
    font-weight: 400;
    margin-right: 3px;
}

.amount-input {
    width: 100%;
    padding: 7px 0;
    font-size: 50px;
    font-weight: 500;
    border: 2px solid var(--color-primary-dark);
    border-radius: 5px;
    box-sizing: border-box;
    font-family: var(--font-main);
    background-color: var(--color-primary-light);
    text-align: center;
    display: none;
}

.amount-input:focus {
    outline: none;
}

.current {
    display: flex;
    justify-content: space-between;
}

h2#current-BTC-price-display,
h2#current-BTC-change-display {
    font-size: 32px;
    font-weight: 500;
    margin: 0;
}

p#current-BTC-price-label,
p#current-BTC-change-label {
    font-size: 0.9rem;
    font-weight: 500;
    margin-top: 10px;
    margin-bottom: 0;
}

.current-BTC-change {
    text-align: right;
    position: relative;
    cursor: pointer;
}

.unit-selector {
    display: flex;
    gap: 5px;
    margin-bottom: 5px;
    position: relative;
    flex-wrap: wrap;
}

img.info-icon {
    width: 24px;
    height: 24px;
    padding-top: 2px;
}

/* --------------------------------------------------------------------------
   COMPONENTS - Menus
   -------------------------------------------------------------------------- */
.period-menu {
    display: flex;
    position: absolute;
    bottom: -20px;
    right: 0;
    width: 60px;
    background-color: var(--color-white);
    border-radius: 3px;
    z-index: var(--z-menu);
    flex-direction: column;
    box-shadow: 0 0 15px #0005;
    opacity: 0;
    transform: translateY(100px);
    transition: opacity var(--transition-standard), transform var(--transition-standard);
    pointer-events: none;
}

.period-menu.active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.period-menu button {
    color: var(--color-black);
    font-size: 1.2rem;
    font-weight: 500;
    display: block;
    width: 100%;
    padding: 9px 0;
    margin: 0 0 1px;
    background-color: var(--color-gray-light);
}

.period-menu button:hover {
    background-color: var(--color-white);
}

.period-menu button.selected {
    background-color: var(--color-primary-dark);
    color: var(--color-white);
    font-weight: 700;
}

/* --------------------------------------------------------------------------
   OVERLAYS - Modal & Keypad
   -------------------------------------------------------------------------- */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: transparent;
    justify-content: center;
    align-items: flex-end;
    z-index: var(--z-overlay);
    transform: translateZ(0);
    /* Hardware acceleration */
}

.modal-content {
    background: var(--color-black);
    padding: 20px 20px 30px;
    width: 100%;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.2);
    transform: translateY(100%);
    transition: transform var(--transition-standard);
    will-change: transform;
    z-index: var(--z-modal-content);
    user-select: none;
}

.modal.open .modal-content {
    transform: translateY(0);
}

.keypad-container {
    max-width: 400px;
    margin: 0 auto;
    width: 100%;
}

.keypad {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 15px;
}

.keypad button {
    padding: 9px 0;
    font-size: 21px;
    background: var(--color-gray-medium);
    color: var(--color-white);
    border-radius: 4px;
    font-weight: 500;
    touch-action: manipulation;
}

.keypad button:hover {
    background: var(--color-warning-hover);
}

.modal-actions {
    display: flex;
    justify-content: space-between;
}

.modal-actions button {
    width: 48%;
    padding: 10px 0 12px;
    font-size: 18px;
    border-radius: 4px;
    color: var(--color-white);
    font-weight: 500;
}

.modal-actions .cancel {
    background: var(--color-danger);
}

.modal-actions .cancel:hover {
    background: var(--color-danger-hover);
}

.modal-actions .ok {
    background: #050;
}

.modal-actions .ok:hover {
    background: #080;
}

/* --------------------------------------------------------------------------
   OVERLAYS - Info Panel & Info Modal
   -------------------------------------------------------------------------- */
.info-panel {
    position: fixed;
    top: 0;
    right: -135%;
    width: 360px;
    height: auto;
    background-color: var(--color-black);
    border-radius: 10px 0 0 10px;
    box-shadow: -2px 0 5px rgba(0, 0, 0, 0.5);
    transition: right var(--transition-standard);
    z-index: var(--z-overlay);
}

.info-panel.open {
    right: -25px;
}

.info-panel-content {
    color: var(--color-white);
    padding: 30px 20px 30px 30px;
    position: relative;
}

.close-btn {
    position: absolute;
    top: 22px;
    right: 20px;
    width: 32px;
    height: 32px;
    background-color: var(--color-gray-dim);
    color: var(--color-white);
    border-radius: 50%;
    font-size: 24px;
    display: flex;
    justify-content: center;
    align-items: center;
}

h3.panel-title {
    color: var(--color-primary);
    font-size: 1.5rem;
    margin: -5px 0 20px;
}

.info-panel p,
.info-panel ul {
    font-size: 1.1rem;
    font-weight: 500;
}

.info-panel ul {
    list-style-type: none;
    padding-left: 0;
    margin-bottom: 0;
}

.info-panel ul li {
    line-height: 1.35;
    padding-bottom: 20px;
}

.info-panel a {
    color: var(--color-white);
    border-bottom: 1px dashed var(--color-white);
}

.info-panel a:hover {
    color: #ff0;
    border-bottom: 1px solid #ff0;
}

/* Inline Info Modal */
.info-modal {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--color-black);
    border-radius: 5px;
    padding: 20px;
    z-index: var(--z-overlay);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    transform: translateY(270%);
    transition: transform var(--transition-standard);
}

.info-modal.is-visible {
    transform: translateY(0);
}

.modal-text {
    margin: -5px 10px;
    font-size: 1.12rem;
    font-weight: 500;
    line-height: 1.4;
    color: var(--color-white);
    padding: 9px 0;
}

.info-modal p.modal-text[data-translate="infoModalText0"] {
    color: var(--color-primary);
    font-weight: 900;
}

.close-modal-btn {
    position: absolute;
    top: 5px;
    right: 5px;
    color: var(--color-white);
    background: none;
    font-size: 16px;
}

/* --------------------------------------------------------------------------
   DARK MODE THEME OVERRIDES
   -------------------------------------------------------------------------- */
body.dark-mode {
    background-color: var(--theme-bg-main) !important;
    color: var(--theme-text-main);
}

.dark-mode .main-container {
    background-color: var(--theme-bg-main);
}

.dark-mode h1,
.dark-mode h2,
.dark-mode h3,
.dark-mode p,
.dark-mode a {
    color: var(--theme-text-main);
}

.dark-mode .amount-display {
    background-color: var(--theme-bg-secondary);
    color: var(--theme-text-main);
}

.dark-mode .amount-input {
    background-color: var(--theme-bg-secondary);
    color: var(--theme-text-main);
    border-color: var(--theme-active-btn);
}

.dark-mode button.unit-btn {
    background-color: var(--theme-bg-secondary);
    color: #ccc;
}

.dark-mode button.unit-btn.active {
    background-color: var(--theme-active-btn);
    color: var(--theme-active-btn-text) !important;
}

.dark-mode button.lang-btn {
    background-color: #2a2a2a;
    color: #ccc;
}

.dark-mode button.lang-btn.active {
    background-color: var(--theme-active-btn);
    color: var(--theme-active-btn-text) !important;
}

.dark-mode .period-menu {
    background-color: var(--theme-bg-secondary);
}

.dark-mode .period-menu button {
    background-color: #3d3d3d;
    color: #fff;
}

.dark-mode .period-menu button.selected {
    background-color: var(--theme-active-btn);
}

.dark-mode .info-panel {
    background-color: #000;
}

.dark-mode .info-modal {
    background: #000;
}

.dark-mode-icon {
    width: 36px;
    height: 36px;
    min-width: 36px;
    min-height: 36px;
    flex-shrink: 0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    background: #333;
    margin-left: 10px;
    margin-top: 18px;
}

.dark-mode-icon .material-symbols-outlined {
    font-size: 24px;
    color: var(--color-accent);
}

.dark-mode img.info-icon {
    filter: invert(1);
}

/* Override for larger screens */
@media (min-width: 768px) {
    body.dark-mode {
        background-color: var(--theme-bg-page) !important;
    }
}

/* --------------------------------------------------------------------------
   ANIMATIONS
   -------------------------------------------------------------------------- */
@keyframes spinEightTimes {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(2160deg);
    }

    /* 8 * 360 = 2880? No, 8*360=2880. Existing code had 2160 (6 times). Keeping as is for consistency. */
}

/* --------------------------------------------------------------------------
   RESPONSIVE DESIGN (Media Queries)
   -------------------------------------------------------------------------- */

/* Large Screens */
@media (min-width: 768px) {
    body {
        background-color: var(--color-black) !important;
    }

    .main-container {
        padding: 30px !important;
    }

    body.dark-mode {
        height: 100vh;
    }

    .keypad button {
        padding: 18px;
    }
}

/* Desktop Hover */
@media (min-width: 992px) {
    img.mybtclogo:hover {
        transform: scale(1.05);
    }
}

/* Small Screens */
@media (max-width: 400px) {

    h2#current-BTC-price-display,
    h2#current-BTC-change-display {
        font-size: 27px;
    }

    p.footer-info {
        font-size: 0.85rem;
    }
}

/* Extra Small Screens */
@media (max-width: 325px) {
    .info-panel {
        width: 330px;
    }

    .info-panel p,
    .info-panel ul {
        font-size: 0.9rem !important;
    }

    .info-panel ul li {
        line-height: 1.15 !important;
        padding-bottom: 13px !important;
    }
}

@media (max-width: 320px) {
    .fiat-unit-selector {
        gap: 2px;
    }

    button.unit-btn {
        padding: 3px 4px;
        font-size: 0.7rem;
        min-width: 35px;
    }
}